Role of intraspecific competition in intrinsic growth rate regulation in an Oikopleura dioica(Tunicata) population
文献类型：CNKI期刊论文
| 作者 | Shuai LI; Guangtao ZHANG
|
| 发表日期 | 2021-03-15 |
| 出处 | Journal of Oceanology and Limnology
 |
| 关键词 | Oikopleura dioica population size intraspecific competition growth fecundity r_(max) |
| 英文摘要 | Planktonic Oikopleura dioica respond almost instantly to opportunistic algal blooms,but it is unknown whether the population increase can change from an exponential to a logistic model to avoid a final sudden collapse.To test the hypothesis that intraspecific competition regulates the intrinsic rate of natural increase(r),density-dependent effects on growth and reproduction performance were investigated in O.dioica via laboratory incubations.Over a large food concentration range,batch maturation was observed above the per capita food supply(PFS) of 8.1 μg C/ind.in 4.5 d.Somatic growth was saturated beyond this PFS value,whereas gonad length increased continuously.Below this threshold,individuals reached small body and gonad lengths,and maturation was rarely observed during the incubation period.The gonad/body volume and maturation ratios also increased with the PFS.Instead of the food concentration,the r values were regulated by competition pressure via variability in maturation duration and the proportion of mature individuals in the cohorts.When the minimum food demand was satisfied in the designated generation time,the r value tended to be regulated by the spawning proportion in the population.Otherwise,prolonged development duration and decreased r values were expected. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA23050401) ; the National Key Research and Development Program of China (No. 2017YFE0111100) ; the National Key Basic Research Program of China (973 Program)(No. 2015CB452903) ; the Science and Technology Service Network (STS)(No. Y82346101L) ; the Taishan Scholars Project to SUN Song |
| 卷 | v.39期:02页:248-261 |
| 语种 | 英文; |
| 分类号 | Q958.8 |
| ISSN号 | 2096-5508 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/187827]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.JiaozhouBayNationalMarineEcosystemResearchStation,InstituteofOceanology,ChineseAcademyofSciences 2.UniversityofChineseAcademyofSciences 3.LaboratoryforMarineEcologyandEnvironmentalScience,QingdaoNationalLaboratoryforMarineScienceandTechnology |
| 推荐引用方式 GB/T 7714 | Shuai LI,Guangtao ZHANG. Role of intraspecific competition in intrinsic growth rate regulation in an Oikopleura dioica(Tunicata) population. 2021. |
入库方式： OAI收割
来源：海洋研究所
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