Abstract
Permanent and temporary wetlands in Mediterranean shrublands represent unique repositories of biodiversity, which are increasingly threatened by human-induced habitat loss. The zooplankton of a permanent (P1) and a temporary pond (T35) in the Natural Reserve of Castelporziano, a rare residual stretch of such a shrubland in Central Italy (Latium), was investigated to: (1) expand and deepen knowledge of these endangered freshwater habitats, which represent a crucial component of Mediterranean biodiversity; (2) identify environmental controls regulating the development of zooplankton communities of each environment; and (3) highlight differences in the adaptive responses of the zooplankton community in relation to the different ecological conditions experienced by permanent and temporary habitats. Despite summer desiccation in T35, the two ponds exhibited a relative homogeneity in hydrological and physico-chemical dynamics. Zooplankton assemblages contained 41 total taxa, of which 32 were found in P1 and 28 in T35. Out of the 41 taxa identified, 22 (>50%) were exclusively present in one of the two ponds. On a yearly basis, the community dynamics of P1 seemed to be conditioned by physical and chemical factors and by hydrological cycle characteristics, while the community of T35 responded to algal blooms, food competition and predator/prey equilibria rather than correlating to abiotic factors. The main differences amongst zooplankton assemblages were observed over short time scales and occurred both within and between seasons, highlighting the role of some structural taxa that dominated the average composition of the community throughout the year, and the importance of “quick-response” taxa in determining the short-term composition and structure variation of pond zooplankton. A year-round cyclic community succession peculiar to each pond is described.
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Acknowledgements
We thank the General Management of the Natural Reserve of Castelporziano for its helpfulness. We wish to thank: Dr. S. Mariani of University College Dublin for his criticism on the work, Dr. I. Mcgilvray for language revision, Dr. N. Pacini for language and matter revision, and the Editor and anonymous referees for criticism and suggestions.
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Seminara, M., Vagaggini, D. & Margaritora, F.G. Differential responses of zooplankton assemblages to environmental variation in temporary and permanent ponds. Aquat Ecol 42, 129–140 (2008). https://doi.org/10.1007/s10452-007-9088-0
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DOI: https://doi.org/10.1007/s10452-007-9088-0