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[Population structure and quantitative dynamics of Stellera chamaejasme in degraded typical steppe]. / 退化典型草原狼毒种群结构与数量动态.
Guo, Li-Zhu; Zhao, Huan; Lyu, Jin-Ying; Wang, Kai-Li; Liu, Ke-Si; Wang, Kun; Huang, Ding.
Afiliação
  • Guo LZ; College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.
  • Zhao H; Guyuan National Grassland Ecosystem Field Station, Guyuan 076550, Hebei, China.
  • Lyu JY; College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.
  • Wang KL; Guyuan National Grassland Ecosystem Field Station, Guyuan 076550, Hebei, China.
  • Liu KS; College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.
  • Wang K; Guyuan National Grassland Ecosystem Field Station, Guyuan 076550, Hebei, China.
  • Huang D; College of Grassland Science and Technology, China Agricultural University, Beijing 100193, China.
Ying Yong Sheng Tai Xue Bao ; 31(9): 2977-2984, 2020 Sep 15.
Artigo em Chinês | MEDLINE | ID: mdl-33345498
ABSTRACT
Stellera chamaejasme is one of most common poisonous plant species in degraded grasslands of China. S. chamaejasme could dominate the community in some severely degraded grasslands, which is a serious threat to the sustainable development of animal husbandry in natural grasslands. In this study, S. chamaejasme population was divided into 10 age classes according to the number of branches. We investigated the age structure of S. chamaejasme population and population dynamic indices, and quantified the survival status of S. chamaejasme population by compiling a static life table, drawing a survival curve, conducting survival analysis. The age structure of S. chamaejasme population in the study area was growth type. The number of individuals in Ⅰ age class was sufficient but with relatively low survival rate. The population structure of S. chamaejasme was fitted the growing type. The development process of population was fluctuating. The number of individuals would drop sharply in Ⅱ and Ⅷ, indicating that these two age classes were the bottleneck period in the development of S. chamaejasme population. The survival curves of S. chamaejasme population was the Deevey-Ⅱ type. The results of survival analysis showed that the population had a sharp decrease in the early stage and was stable in the later stage, which was because the value of fx and λx of S. chamaejasme in Ⅰ or Ⅱ age class were the highest. In conclusion, sufficient young individuals (Ⅰ) was the basis for the expansion of S. chamaejasme population in the degraded typical steppe. The low transformation rate of young individuals to adults might be one of the reasons explaining why S. chamaejasme population could not expand rapidly in the early stage of grassland degradation. Therefore, it was suggested to intervene early when the number of S. chamaejasme was limited.
Assuntos
Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Thymelaeaceae Limite: Animais / Humanos País/Região como assunto: Ásia Idioma: Chinês Revista: Ying Yong Sheng Tai Xue Bao Assunto da revista: Saúde Ambiental Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: China

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Assunto principal: Thymelaeaceae Limite: Animais / Humanos País/Região como assunto: Ásia Idioma: Chinês Revista: Ying Yong Sheng Tai Xue Bao Assunto da revista: Saúde Ambiental Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: China
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