Steiner Christopher F, Asgari Mitra
Department of Biological Sciences, Wayne State University, 5047 Gullen Mall, Detroit, MI 48202, USA.
R Soc Open Sci. 2022 Feb 16;9(2):211309. doi: 10.1098/rsos.211309. eCollection 2022 Feb.
Fragmentation is predicted to reduce biodiversity and stability by increasing habitat isolation and impeding dispersal among patches. These effects may manifest at both the interspecific and intraspecific levels, yet few studies have simultaneously explored dispersal effects across levels of organization. We used field mesocosm experiments to examine how habitat isolation (in the form of dispersal rate) alters inter- and intraspecific stability and diversity in local zooplankton communities. We observed effects of increasing dispersal rate at both the intra- and interspecific levels. Increasing dispersal increased local species diversity and reduced mean temporal variability of populations. At the intraspecific level, clonal diversity was enhanced by dispersal and mean temporal variability of clone abundances through time was reduced.
据预测，破碎化会通过增加栖息地隔离和阻碍斑块间的扩散来降低生物多样性和稳定性。这些影响可能在种间和种内层面都有所体现，但很少有研究同时探讨不同组织层面的扩散效应。我们利用野外中宇宙实验来研究栖息地隔离（以扩散率的形式）如何改变当地浮游动物群落的种间和种内稳定性及多样性。我们在种内和种间层面都观察到了扩散率增加的影响。扩散率增加提高了当地物种多样性，并降低了种群的平均时间变异性。在种内层面，扩散增强了克隆多样性，且随着时间推移克隆丰度的平均时间变异性降低。
