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1.
Sci Total Environ ; 750: 142316, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-33182175

RESUMO

The western tubenose goby is one of the most wide-spread invasive fish species in European freshwaters, though information of its life-history in relation to its invasion success is limited. We compared the reproductive traits, growth rate and condition of three populations that differed in their stage of invasion in its expanding range in the River Vistula: core - the oldest population established at the centre of the invasive range; intermediate - long established by downstream dispersal from the core area but continuously supplemented by drifting specimens; front - new population at the edge of the invasive range, upstream from the core area. Pronounced differences in life-history traits were found between the 'core' and the 'front' populations. The 'front' population displayed high investment in reproduction and had heavier gonads, higher fecundity, higher batch fecundity though smaller eggs than the 'core' population. The 'core' population was characterized by the lowest fecundity, the largest eggs, the highest condition after spawning, and the highest maximum age of males. The 'intermediate' population was intermediate between the 'front' and the 'core' populations regarding reproductive traits, but showed the highest growth rates. The life-history traits that varied most among populations were gonad weight, fecundity, gonado-somatic index, condition and growth in the first years of life. Inter-individual variability of life-history traits was lower in the front of the invasive range than in the core and intermediate area. The observed plasticity in life-history appears to favour production of large numbers of offspring in newly-colonised areas in the initial stages of invasion and at the edge of the expanding range. In longer-established populations, at the core of invasive range, a strategy for greater competitiveness under intra-specific competition appears to be favoured.


Assuntos
Perciformes , Animais , Peixes , Espécies Introduzidas , Masculino , Reprodução , Rios
2.
Mar Pollut Bull ; 160: 111637, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33181924

RESUMO

This study reports on the ingestion of microplastics by the alien fish Pirapitinga, Piaractus brachypomus (Characiformes; Serrasalmidae) that escaped Vembanad lake, the largest brackish water lake in the south-west coast of India, from the aquaculture systems during flooding. Microplastics separated from the gut of 32 out of the 123 fishes (26%) examined were identified using Attenuated Total Reflectance - Fourier Transform Infrared (ATR-FTIR), and Raman Spectroscopy. In total, 69 microplastic particles, represented by fibers, foam and fragments were recovered from the fish, with sizes ranging from 0.89 to 4.85 mm. The ATR-FTIR spectral analyses revealed the presence of polymers polyethylene and Nylon 6. The occurrence of PP, Nylon 6, PET and PBT were confirmed using Raman spectroscopy. The presence of MPs in the gut content of alien fish P. brachypomus could be a reflection of the increasing microplastics pollution in the estuaries and backwaters along the south-west coast of India.


Assuntos
Caraciformes , Poluentes Químicos da Água , Animais , Monitoramento Ambiental , Peixes , Índia , Espécies Introduzidas , Lagos , Microplásticos , Plásticos , Poluentes Químicos da Água/análise
3.
Mar Pollut Bull ; 160: 111645, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33181927

RESUMO

Recreational ports are known to be sources of pollution to the coastal marine environment due to the pouring of pollutants or the transfer of invasive species to neighboring areas. Nonetheless, the responsibility of protecting the marine environment does not lie solely on the users of the ports, but also affects the rest of citizens. Thus, an effective communication is necessary between scientists and citizens to avoid the lack of knowledge and boost cooperation against these environmental problems. In this study, (focused on the marina of Gijon, Northwestern Spain) citizens set education and social media as the main sources of information, rarely considering science outreach. Also, their environmental knowledge showed to be based on a visual perception, rather than on a cognitive one, as marine litter was considered a great environmental problem, while invasive species and biofouling went unnoticed, remarking the lack of an effective communication from scientific sources.


Assuntos
Biodiversidade , Monitoramento Ambiental , Poluição Ambiental , Espécies Introduzidas , Espanha
4.
Mar Pollut Bull ; 160: 111659, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33181936

RESUMO

Tubastraea coccinea Lesson, 1830 and T. tagusensis Wells 1982 are azooxanthellate corals non-native to Brazil and introduced through fouling on oil platforms, the primary vector. They first invaded the tropical rocky reefs at Ilha Grande Bay (southwest Atlantic Ocean), during the early 1990s. Currently, at some Brazilian locations these species occupy 80% of the benthos of the shallow subtidal. They cause economic and environmental impacts by fouling shipping and modifying native communities. This study provides observations of an additional mechanism of secondary dispersal by T. coccinea and T. tagusensis that were seen attached to floating wood debris and marine litter, which are highly abundant in the region. Such rafting corals have been found adjacent to invaded reefs and stranded on beaches. These observations indicate that transport by rafting over long distances may be another mechanism of range expansion and secondary introduction of these invasive species within the region.


Assuntos
Antozoários , Animais , Oceano Atlântico , Brasil , Ecossistema , Espécies Introduzidas , Madeira
5.
PLoS One ; 15(10): e0238478, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33112879

RESUMO

Environments in both biotic and abiotic ecosystems have been affected by the colonization of non-native flora. In this study, we examined the effect of Bidens alba invasion on different land-use types along a coastline in southern China. Bacterial communities in each site were determined using 16S rDNA sequencing, and soil physicochemical properties were analyzed using standard methods. Although our results indicated that B. alba invasion did not have a significant effect on the alpha diversity of bacteria, it caused significant differences in soil bacterial community composition between invaded and uninvaded soil across different land-use types. Beta diversity and several physicochemical properties in forest, orchard and waterfront environments were recorded to be more susceptible to B. alba invasion. A high proportion of the variation of bacterial communities can be explained by a combination of environmental variables, indicating that environmental selection rather than plant invasion is a more effective process in coastal microbial assemblages. By comparing topological roles of shared OTUs among invaded and uninvaded soil, keystone taxa in invaded soil were identified. Acidobacteria was the major phyla involved in the invasive process which could be driven by environmental selection. How key phyla react in our experiment should be verified by further studies.


Assuntos
Bidens/fisiologia , Espécies Introduzidas , Microbiologia do Solo , Acidobacteria/genética , Acidobacteria/isolamento & purificação , Biodiversidade , China , Ecossistema , Microbiota/genética , Recursos Naturais , RNA Bacteriano/genética , RNA Ribossômico 16S/genética , Solo/química
6.
Mar Environ Res ; 161: 105056, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-33070931

RESUMO

Port areas have been considered bioinvasion hotspots due to the concentration of several invasion vectors. However, the actual distribution of non-indigenous species (NIS) in Mediterranean ports is still poorly understood. Here we conducted a literature review with the aim to provide a knowledge baseline about NIS distribution in Mediterranean ports. NIS distribution in Mediterranean ports showed a high degree of heterogeneity in terms of studies across the whole basin, with a limited knowledge on both specific taxa and geographical areas, as well as a generally low proportion of investigated ports. The low rate of specific studies designed to monitor these particular environments may represent the main source of knowledge gaps. Mediterranean ports host NIS from all regions of the world, playing a key role in marine bioglobalization. Our synthesis represents the first baseline addressing the presence of NIS in Mediterranean ports, which may be useful to define plans of NIS management and strategies focusing on a network of recognised focal hotspots.


Assuntos
Espécies Introduzidas , Navios , Mar Mediterrâneo
7.
PLoS One ; 15(10): e0230037, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33104733

RESUMO

BACKGROUND: Bacteremia is a leading cause of mortality in developing countries, however, etiologic evaluation is infrequent and empiric antibiotic use not evidence-based. Here, we evaluated the patterns of ESBL resistance in children enrolled into a surveillance study for community acquired bacteremic syndromes across health facilities in Central and Northwestern Nigeria. METHOD: Blood culture was performed for children aged less than 5 years suspected of having sepsis from Sept 2008-Dec 2016. Blood was incubated using the BACTEC00AE system and Enterobacteriacea identified to the species level using Analytical Profile Index (API20E®). Antibiotic susceptibility profile was determined by the disc diffusion method. Real time PCR was used to characterize genes responsible for ESBL production. RESULT: Of 21,000 children screened from Sept 2008-Dec 2016, 2,625(12.5%) were culture-positive. A total of 413 Enterobacteriaceae available for analysis were screened for ESBL. ESBL production was detected in 160 Enterobacteriaceae, high resistance rates were observed among ESBL-positive isolates for Ceftriaxone (92.3%), Aztreonam (96.8%), Cefpodoxime (96.3%), Cefotaxime (98.8%) and Trimethoprim/sulfamethoxazole (90%), while 87.5%, 90.7%, and 91.9% of the isolates were susceptible to Imipenem, Amikacin and Meropenem respectively. Frequently detected resistance genes were blaTEM-83.8% (134/160), and, blaCTX-M 83.1% (133/160) followed by blaSHVgenes 66.3% (106/160). Co-existence of blaCTX-M, blaTEM and blaSHV was seen in 94/160 (58.8%), blaCTX-M and blaTEM in 118/160 (73.8%), blaTEM and blaSHV in 97/160 (60.6%) and blaCTX-M and blaSHV in 100/160 (62.5%) of isolates tested. CONCLUSION: Our results indicate a high prevalence of bacteremia from ESBL Enterobacteriaceae in this population of children. These are resistant to commonly used antibiotics and careful choice of antibiotic treatment options is critical. Further studies to evaluate transmission dynamics of resistance genes could help in the reduction of ESBL resistance in these settings.


Assuntos
Antibacterianos/farmacologia , Bacteriemia/epidemiologia , Infecções por Enterobacteriaceae/epidemiologia , Enterobacteriaceae/classificação , Resistência beta-Lactâmica , Bacteriemia/microbiologia , Pré-Escolar , Testes de Sensibilidade a Antimicrobianos por Disco-Difusão , Enterobacteriaceae/efeitos dos fármacos , Enterobacteriaceae/isolamento & purificação , Infecções por Enterobacteriaceae/microbiologia , Medicina Baseada em Evidências , Feminino , Humanos , Lactente , Espécies Introduzidas , Masculino , Nigéria/epidemiologia , Vigilância da População , Prevalência
8.
PLoS One ; 15(10): e0239742, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33021997

RESUMO

The yellow-legged hornet, Vespa velutina nigrithorax (Hymenoptera: Vespidae, Lepeletier 1836), is native to Southeast Asia and has been unintentionally introduced in France. The species is spreading in many areas of the world. The European Union has classified V. velutina as a species of concern because the hornet significantly affects beekeeping activities, mostly by preying honeybees (Apis mellifera) at beehive entrances. No current control method is simultaneously eco-friendly and effective. Here, we aimed to develop a greener technique for destroying V. velutina nests, inspired by a defense behavior used by the eastern honeybee (Apis cerana), the "heat ball". In the laboratory, we tested how V. velutina of different sexes, castes, and developmental stages responded to different heat exposure systems employing a range of temperature levels. Overall, the time of death decreased as temperature increased. Hornets died faster when the temperature was gradually increased than when it was instantaneously increased; larvae seemed to be more thermally tolerant. The most promising and potential technique for quickly destroying hornet nests may be steam injection, as the humid airflow system killed all hornets within 13 seconds, and therefore could be a good candidate for a green nest control method.


Assuntos
Controle de Insetos/métodos , Espécies Introduzidas , Termotolerância/fisiologia , Vespas/fisiologia , Animais , Abelhas/fisiologia , Feminino , França , Temperatura Alta , Larva/fisiologia , Masculino , Temperatura
9.
Science ; 370(6513): 220-222, 2020 10 09.
Artigo em Inglês | MEDLINE | ID: mdl-33033218

RESUMO

Environmental change is transforming ecological assemblages into new configurations, resulting in novel communities. We developed a robust methodology to detect novel communities, examine patterns of emergence, and quantify probabilities of local demographic turnover in transitions to and from novel communities. Using a global dataset of Cenozoic marine plankton communities, we found that the probability of local extinction, origination, and emigration during transitions to a novel community increased two to four times that of background community changes. Although rare, novel communities were five times more likely than chance to shift into another novel state. For marine plankton communities at a 100,000-year time grain, novel communities were sensitive to further extinctions and substantial community change.


Assuntos
Biodiversidade , Extinção Biológica , Plâncton , Conjuntos de Dados como Assunto , Especiação Genética , Espécies Introduzidas , Probabilidade
10.
Zootaxa ; 4852(1): zootaxa.4852.1.10, 2020 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-33056715

RESUMO

Invasive alien species (IAS) are a major threat to biodiversity and have contributed to population declines in native species worldwide (Vilà et al. 2011; Gurevitch Padilla 2004). IUCN's Invasive Species Specialist Group lists some 80 invasive or potentially invasive species in Sri Lanka, which is part of a global biodiversity hotspot (Myers et al. 2000; Marambe et al. 2011). The major release of aquatic IAS on the island are routed through the ornamental-fish industry (Marambe et al. 2011; Sudasinghe 2016), though a minority represents deliberate, if unplanned, introductions by governmental and non-governmental agencies (Marambe et al. 2011).


Assuntos
Peixes-Gato , Animais , Biodiversidade , Espécies Introduzidas , Sri Lanka
11.
Zootaxa ; 4838(1): zootaxa.4838.1.9, 2020 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-33056838

RESUMO

The genus Empoasca comprises more than 600 species, many of them important pests of cultivated plants. The leafhopper Empoasca fabalis DeLong, 1930 is native to the tropical and subtropical regions of America. From here, it has successfully spread to most regions of the continent. Today its range extends from the southern United States, through Central America, and the West Indies to southern South America (Cusipuma Sanchez 1993, DeLong 1930, Paradell et al. 1990, Poos Wheeler 1949, Wolcott, 1948). Outside its native area, the species was more recently recorded in the Canary Islands (Lorenzo Hermoso de Mendonza 2000) and Hawaii (Dietrich Perreira 2019). Although it is still not known to occur in the European mainland, specimens were collected in 2000 on the island of La Palma (Spain) (Lorenzo Hermoso de Mendonza, 2000). Until now, it was unknown on the island of Madeira and Portugal.


Assuntos
Hemípteros , Solanum tuberosum , Animais , Espécies Introduzidas , Portugal
12.
Zootaxa ; 4760(1): zootaxa.4760.1.1, 2020 Apr 07.
Artigo em Inglês | MEDLINE | ID: mdl-33056888

RESUMO

The present paper is a contribution to the taxonomy of the genus Strandesia. Here, we describe three new species: S. thomazi nov. sp., S. galeati nov. sp. and S. nakatanii nov. sp. We also describe the male of Strandesia obtusata (Sars, 1901); this is the first record of sexual populations of a Brazilian Strandesia species. Nine other Strandesia species from the Amazon, Araguaia, Pantanal and Paraná river floodplains are redescribed. We also propose that Strandesia trichosa Roessler, 1990 is a synonym of Strandesia psittacea Sars, 1901. Most of the species analyzed here are endemic to the Neotropical region, with the exception of Strandesia bicuspis (Claus, 1892) G.W. Müller, which occurs also (as an alien invasive species) in the Palaearctic. This genus occurs in water bodies with a wide range of abiotic variables and in many different aquatic macrophyte species. The species analyzed here have a highly conservative soft part morphology, but an impressive variety of carapace shapes.


Assuntos
Crustáceos , Animais , Brasil , Espécies Introduzidas , Masculino , Rios
13.
An Acad Bras Cienc ; 92(3): e20200410, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33111822

RESUMO

Biological invasion is a major threat to global biodiversity and ecosystem services. We examined the functional traits similarity between a set of native and non-native invasive tree species from the Southern Brazilian subtropical mixed forest, part of an important global hotspot for biodiversity conservation. We hypothesized that invasive species occupy marginal niche spaces. We ordered the species using the Principal Component Analysis based on their wood density, leaf area, and specific leaf area. These are all important traits that summarize essential ecological strategies associated with resource acquisition and conservation. Functional overlaps between non-native and native species were analyzed through kernel density estimation of continuous traits data. While native and non-native invasive species were distributed along the same functional gradients, the position of non-native species in the functional space is species and traits specific. We concluded that within Brazilian subtropical mixed forests, the functional dissimilarity as a key factor in invasion success could not be generalized for all species and traits.


Assuntos
Biodiversidade , Espécies Introduzidas , Árvores , Brasil , Ecossistema , Florestas
14.
Nat Commun ; 11(1): 5213, 2020 10 15.
Artigo em Inglês | MEDLINE | ID: mdl-33060612

RESUMO

The globalization of trade and human movement has resulted in the accidental dispersal of thousands of alien species worldwide at an unprecedented scale. Some of these species are considered invasive because of their extensive spatial spread or negative impacts on native biodiversity. Explaining which alien species become invasive is a major challenge of invasion biology, and it is often assumed that invasiveness is linked to a greater ability to establish in novel climates. To test whether invasive species have expanded more into novel climates than non-invasive alien species, we quantified niche shifts of 82 ant species. Surprisingly, invasive species showed smaller niche shifts than non-invasive alien species. Independent of their invasiveness, the species with the smallest native niches and range sizes, experienced the greatest niche shifts. Overall, our results challenge the assumption that invasive species are particularly good pioneers of novel climates.


Assuntos
Formigas/classificação , Clima , Espécies Introduzidas , Animais , Biodiversidade , Mudança Climática , Ecossistema , Geografia , Humanos , Especificidade da Espécie
15.
Zootaxa ; 4772(1): zootaxa.4772.1.8, 2020 May 07.
Artigo em Inglês | MEDLINE | ID: mdl-33055629

RESUMO

Invasive species threaten the ecological and economic wellbeing of a country (Pimentel et al. 2001). In the last decade, several mealybugs and soft scale insects have been accidentally introduced to India, of which some have become serious pests (e.g., Phenacoccus solenopsis Tinsley, Paracoccus marginatus Williams Granara de Willink, Phenacoccus madeirensis Green and Pseudococcus jackbeardsleyi Gimpel Miller); others are widening their host ranges and spreading rapidly. Kilifia acuminata (Signoret) and Protopulvinaria longivalvata Green seem relatively harmless but Trijuba oculata (Brain) and Pulvinaria urbicola Cockerell cause economic damage (Joshi Rameshkumar 2013; Joshi 2017).


Assuntos
Hemípteros , Manihot , Animais , Índia , Espécies Introduzidas , Verduras
16.
Proc Biol Sci ; 287(1935): 20201791, 2020 09 30.
Artigo em Inglês | MEDLINE | ID: mdl-32933443

RESUMO

Biological invasions have increased in the last few decades mostly due to anthropogenic causes such as globalization of trade. Because invaders sometimes cause large economic losses and ecological disturbances, estimating their origin and potential geographical ranges is useful. Drosophila subobscura is native to the Old World but was introduced in the New World in the late 1970s and spread widely. We incorporate information on adaptive genetic markers into ecological niche modelling and then estimate the most probable geographical source of colonizers; evaluate whether the genetic bottleneck experienced by founders affects their potential distribution; and finally test whether this species has spread to all its potential suitable habitats worldwide. We find the environmental space occupied by this species in its native and introduced distributions are notably the same, although the introduced niche has shifted slightly towards higher temperature and lower precipitation. The genetic bottleneck of founding individuals was a key factor limiting the spread of this introduced species. We also find that regions in the Mediterranean and north-central Portugal show the highest probability of being the origin of the colonizers. Using genetically informed environmental niche modelling can enhance our understanding of the initial colonization and spread of invasive species, and also elucidate potential areas of future expansions worldwide.


Assuntos
Espécies Introduzidas , Distribuição Animal , Ecossistema , Marcadores Genéticos , Portugal
17.
PLoS One ; 15(9): e0238767, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32898173

RESUMO

AIM: Exotic species' introductions together with extinction of native species represent the main mechanisms driving biotic homogenization of freshwater fish assemblages around the world. While generally ichtyofaunistic realms transit towards biotic homogenization, for conservation purposes it is essential to understand what specific mechanisms are promoting it on particular areas or regions. Here, we report the occurrence of biotic homogenization in 29 Chilean watersheds, analyzing its ß-diversity (including turnover and nestedness) and predicting future trends. LOCATION: Continental Chile (18o-56o S). METHODS: We determined fish composition per basin for historical and current assemblages; extant native, exotic, and extinct species were recorded as 1 (presence) or 0 (absence) in two matrices basins × species. For each matrix, we calculated the turnover (ßsim), nestedness (ßnes), and ß-diversity (ßsor); then, we obtained Δßsim, Δßnes, and Δßsor, as the arithmetical difference between basin pairs over time. In addition, we search for explanatory variables correlating Δßsim, Δßnes, and Δßsor with geographical and land use variables. Finally, simulating events of species introduction (i.e., invasion) and extinction, we generated 15 hypothetical assemblages, looking to establish future trends towards biotic change in Chilean basins. RESULTS: Species turnover and ß-diversity significantly decreased from historical to current assemblages (Δßsim = -0.084; Δßsor = -0.061, respectively), while the species nestedness did not show significant changes (Δßnes = 0.08). Biotic changes have been driven mainly by the introduction of 28 exotic species, with a minor role of extinctions (one species) and translocations (0 species) of native species. Changes in ß-diversity were negatively correlated with area, elevation, and geographical distance between basins but not with land-use nor human population. Finally, the analysis of 15 future assemblages predicts a significant decrease of ß-diversity and turnover, and an increase for species nestedness, this time promoted by an increase in the extinction of native species. MAIN CONCLUSION: Chilean basins show a significant decrease of the distributional ß-diversity and species turnover of the freshwater fish fauna, evidencing a trend towards biotic homogenization. This trend is shared with other Neotropical basins; however, specific mechanisms driving it show different magnitude. Changes in the ß-diversity components do not show correlation with variables associated to land use, thus suggesting that casual introductions of freshwater fishes in Chile follow an opportunistic mode related to commercial use. According to future scenarios simulated, biotic homogenization should increase further, mainly as consequence of increased native extinctions.


Assuntos
Biodiversidade , Extinção Biológica , Peixes/classificação , Água Doce , Espécies Introduzidas/estatística & dados numéricos , Animais , Chile
18.
PLoS One ; 15(9): e0238732, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32898194

RESUMO

Population control of invasive mammal pests is an ongoing process in many conservation projects. In New Zealand, introduced wild domestic cats and mustelids have a severe impact on biodiversity, and methods to reduce and maintain predator populations to low levels have been developed involving poisoning and trapping. Such conservation efforts often run on limited funds, so ways to minimize costs while not compromising their effectiveness are constantly being sought. Here we report on a case example in a 150 km2 area in the North Island, New Zealand, where high predator numbers were reduced by 70-80% in an initial 'knockdown' trapping program, using the full set of traps available in the fixed network and frequent checks, and then maintained at low density using maintenance trapping with less frequent checking. We developed and applied a simulation model of predator captures, based on trapping data, to investigate the effect on control efficacy of varying numbers of trap sites and numbers of traps per site. Included in the simulations were captures of other, non-target, introduced mammals. Simulations indicated that there are potentially significant savings to be made, at least in the maintenance phase of a long-term predator control programme, by first reducing the number of traps in large-scale networks without dramatically reducing efficacy, and then, possibly, re-locating traps according to spatial heterogeneity in observed captures of the target species.


Assuntos
Conservação dos Recursos Naturais/métodos , Ecossistema , Espécies Introduzidas/estatística & dados numéricos , Mamíferos , Comportamento Predatório , Animais , Ilhas , Modelos Estatísticos , Dinâmica Populacional
19.
Proc Natl Acad Sci U S A ; 117(38): 23643-23651, 2020 09 22.
Artigo em Inglês | MEDLINE | ID: mdl-32883880

RESUMO

The ecological niche is a key concept for elucidating patterns of species distributions and developing strategies for conserving biodiversity. However, recent times are seeing a widespread debate whether species niches are conserved across space and time (niche conservatism hypothesis). Biological invasions represent a unique opportunity to test this hypothesis in a short time frame at the global scale. We synthesized empirical findings for 434 invasive species from 86 studies to assess whether invasive species conserve their climatic niche between native and introduced ranges. Although the niche conservatism hypothesis was rejected in most studies, highly contrasting conclusions for the same species between and within studies suggest that the dichotomous conclusions of these studies were sensitive to techniques, assessment criteria, or author preferences. We performed a consistent quantitative analysis of the dynamics between native and introduced climatic niches reported by previous studies. Our results show there is very limited niche expansion between native and introduced ranges, and introduced niches occupy a position similar to native niches in the environmental space. These findings support the niche conservatism hypothesis overall. In particular, introduced niches were narrower for terrestrial animals, species introduced more recently, or species with more native occurrences. Niche similarity was lower for aquatic species, species introduced only intentionally or more recently, or species with fewer introduced occurrences. Climatic niche conservatism for invasive species not only increases our confidence in transferring ecological niche models to new ranges but also supports the use of niche models for forecasting species responses to changing climates.


Assuntos
Ecossistema , Espécies Introduzidas/estatística & dados numéricos , Modelos Biológicos , Distribuição Animal , Animais , Teorema de Bayes , Clima , Plantas , Dinâmica Populacional
20.
Mar Environ Res ; 161: 105084, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32889446

RESUMO

Considering the thermal limits of coastal macroalgae habitats in the South-Eastern Mediterranean, it is important to study the response of the associated meiofauna to better understand the expected feedback of ecosystems to future warming. In this study, we compared benthic foraminiferal assemblages from two common macroalgal habitats, Turf and Coralline algae, based on ecological monitoring of a thermally polluted station representing near future warming, and an undisturbed environment. None of the common local species is confined to a specific algal habitat. This implies that their existence is not threatened by the disappearance of the Coralline algae. However, most likely their community structure will be impacted with coastal warming. Species that are more affiliated with Coralline algae are highly thermally tolerant, thus their proliferation might be reduced with warming. Specifically, the negative response of Coralline algae to warming may limit the contribution of invasive species such as Pararotalia calcariformata.


Assuntos
Foraminíferos , Alga Marinha , Ecossistema , Espécies Introduzidas
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