In many lentic ecosystems, hydroperiod, or the duration of inundation, controls animal community composition and biomass. Although hydroperiod-imposed differences in wetland animal communities could cause differences in animal-driven nutrient supply, hydroperiod has not been considered as a template for investigating patterns of animal-driven nutrient cycling. Here, we use nutrient excretion rates (NH₄-N and SRP) and biomasses of pelagic and benthic invertebrates and salamanders and nutrient uptake rates in a simulation model to estimate animal-driven nutrient supply and pond-level demand along a hydroperiod gradient of 12 subalpine ponds in the U.S. Rocky Mountains that are vulnerable to climate change. We found that animal biomass increased with hydroperiod duration and biomass predicted animal-driven supply contributions among hydroperiod classifications (temporary-permanent). Consequently, community-wide supply was greatest in permanent ponds. Animal-driven N supply exceeded demand in permanent and semi-permanent ponds, whereas P supply equaled demand in both. Conversely, temporary ponds had large deficits in N and P supply due to lower community biomass and hydroperiod-induced constraints on dominant suppliers (oligochaetes and chironomids). The distribution of taxon-specific supply also differed among hydroperiods, with supply dominated by a few taxa in permanent ponds and supply more evenly distributed among temporary pond taxa. The absence or lower biomass of dominant suppliers in temporary ponds creates nutrient deficits and possible limitation of productivity. Thus, as climate warming causes hydroperiods to become increasingly temporary and indirectly prompts biomass declines and compositional shifts, animal-driven nutrient supply will decrease and strong nutrient limitation may arise due to loss of animal-driven supply.

在许多静水生态系统中，水期或洪水持续时间控制着动物群落组成和生物量。尽管湿地动物群落中水期造成的差异可能导致动物驱动养分供应的差异，但水期尚未被视为研究动物驱动养分循环模式的模板。在这里，我们使用养分排泄率 (NH ₄-N 和 SRP) 以及中上层和底栖无脊椎动物和蝾螈的生物量以及模拟模型中的养分吸收率，以估计美国落基山脉 12 个亚高山池塘的水周期梯度上动物驱动的养分供应和池塘水平需求，这些池塘是脆弱的到气候变化。我们发现动物生物量随着水期持续时间而增加，并且生物量预测了水期分类（临时-永久）中动物驱动的供应贡献。因此，社区范围内的永久性池塘的供应量最大。在永久性和半永久性池塘中，动物驱动的 N 供应超过了需求，而 P 供应在两者中均等于需求。反过来，由于社区生物量较低和水期对主要供应者（寡毛纲动物和摇蚊类）的限制，临时池塘在 N 和 P 供应方面存在大量短缺。特定分类群供应的分布在不同水期也不同，供应以永久性池塘中的少数分类群为主，供应在临时池塘分类群中分布更均匀。临时池塘中主要供应者的缺乏或较低的生物量会造成养分不足并可能限制生产力。因此，随着气候变暖导致水周期变得越来越短暂，并间接促使生物量下降和成分变化，动物驱动的养分供应将减少，并且由于动物驱动的供应损失，可能会出现强烈的养分限制。供应以永久性池塘中的少数分类群为主，供应在临时池塘分类群中分布更均匀。临时池塘中主要供应者的缺乏或较低的生物量会造成养分不足并可能限制生产力。因此，随着气候变暖导致水周期变得越来越短暂，并间接促使生物量下降和成分变化，动物驱动的养分供应将减少，并且由于动物驱动的供应损失，可能会出现强烈的养分限制。供应以永久性池塘中的少数分类群为主，供应在临时池塘分类群中分布更均匀。临时池塘中主要供应者的缺乏或较低的生物量会造成养分不足并可能限制生产力。因此，随着气候变暖导致水周期变得越来越短暂，并间接促使生物量下降和组成变化，动物驱动的养分供应将减少，并且由于动物驱动的供应损失，可能会出现强烈的养分限制。