Relationships between hydroperiod length, and seasonal and spatial patterns of beta-diversity of the microcrustacean assemblages in Mediterranean ponds
Relationships between hydroperiod length, and seasonal and spatial patterns of beta-diversity of the microcrustacean assemblages in Mediterranean ponds
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DOI：
10.1007/s10750-015-2515-7
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发表时间：
2016-07
期刊：
影响因子：
2.6
通讯作者：
M. Florencio;C. Díaz‐Paniagua;L. Serrano
中科院分区：
文献类型：
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作者：
M. Florencio;C. Díaz‐Paniagua;L. Serrano
临时池塘是不可预测的栖息地，表现出不同持续时间的淹没期（水文期）。我们假设，在微型甲壳类动物组合的变化，即池塘之间（空间变化）和池塘内的每月规模（年内变化），将根据水文周期长度不同。我们发现，研究池塘的微甲壳动物组合表现出独特的个人模式，依赖于每月的变化。在池塘填充，物种营业额特别高，在短水文周期池塘，可能是由于快速孵化的初始池的物种，这似乎决定了随后的物种演替。一些长水文周期池塘能够在夏季蓄水，这意味着它们可以在初秋容纳成年的微甲壳类动物，而不是最近填满的池塘;因此，在洪水周期开始时，物种周转率可能会增加。在夏季，物种周转率下降（而巢对β-多样性的贡献增加），因为只有少数耐受物种能够承受干燥池塘中发现的恶劣水质。我们建议，保护更广泛的水文周期梯度，通过保护池塘不同的环境条件下，在每个水文周期类别，将维护微甲壳类动物组合的生态动态在临时池塘。
Temporary ponds are unpredictable habitats that exhibit inundation periods of variable duration (hydroperiods). We hypothesised that changes in microcrustacean assemblages, namely among ponds (spatial variation) and within ponds at a monthly scale (intra-annual variation), would differ according to hydroperiod length. We found that the microcrustacean assemblages of the study ponds demonstrated distinctive individual patterns that were dependent on monthly variation. During pond filling, species turnover was particularly high in short-hydroperiod ponds, probably due to the fast hatching of the initial pool of species, which seemed to determine subsequent species succession. Some of the long-hydroperiod ponds were able to hold water during the summer, which meant that they could harbour adult microcrustaceans in the early autumn, in contrast to the recently filled ponds; species turnover could thus increase at the onset of the inundation cycle. In the summer, species turnover decreased (while the contribution of nestedness to β-diversity increased) because only a few tolerant species were able to withstand the poor water quality found in drying ponds. We suggest that preserving the broader hydroperiod gradient, by protecting ponds with different environmental conditions within each hydroperiod category, would safeguard the ecological dynamics of the microcrustacean assemblages found in temporary ponds.