The discrete nature of vernal pools provides opportunities for experiments revealing information applicable to numerous habitats otherwise more difficult to examine in their entirety. This study examines vernal pool diversity in relation to pool thermal regime, morphology, and inter-pool distribution. Using Island Biogeography theory, we predicted that (1) the number of species in a community should be positively correlated with habitat size, and (2) inter-pool distance should be negatively correlated with biological similarity. We developed two alternative hypotheses, based on the expectation that larger pools should be more thermally stable. These hypotheses ask whether thermally stable or variable pools facilitate invertebrate diversity. We studied eight vernal pools on Kennedy Table in Madera County, California. We took measurements of surface-area, mean depth, and volume of each pool, temperature was logged for four weeks, and invertebrates were systematically sampled. All data was analyzed with Pearson correlation or stepwise multiple regression. The results indicated strong negative correlations between average depth with temperature maximum and temperature standard deviation. Pool proximity and invertebrate assemblage similarity were positively related. There was no significant correlation between temperature variation and species richness. Species diversity was not significantly correlated with pool morphology. Our study suggests that vernal pools do not follow standard theories about species diversity. As vernal pools diminish, it is increasingly important for similar studies to continue and expand in order to better understand the driving forces behind their unique faunal assemblages.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.