1. Drying intermittent stream networks often have permanent water refuges that are important for recolonisation. These habitats may be hotspots for interactions between fishes and invertebrates as they become isolated, but densities and diversity of fishes in these refuges can be highly variable across time and space.
2. Insect emergence from streams provides energy and nutrient subsidies to riparian habitats. The magnitude of such subsidies may be influenced by in‐stream predators such as fishes.
3. We examined whether benthic macroinvertebrate communities, emerging adult insects, and algal biomass in permanent grassland stream pools differed among sites with naturally varying densities of fishes. We also manipulated fish densities in a mesocosm experiment to address how fishes might affect colonisation during recovery from hydrologic disturbance.
4. Fish biomass had a negative impact on invertebrate abundance, but not biomass or taxa richness, in natural pools. Total fish biomass was not correlated with total insect emergence in natural pools, but orangethroat darter (Etheostoma spectabile) biomass was inversely correlated with emerging Chironomidae biomass and individual midge body size. The interaction in our models between predatory fish biomass and date suggested that fishes may also delay insect emergence from natural pools, altering the timing of aquatic–terrestrial subsidies.
5. There was an increase over time in algal biomass (chlorophyll‐a) in mesocosms, but this did not differ among fish density treatments. Regardless, fish presence in mesocosms reduced the abundance of colonising insects and total invertebrate biomass. Mesocosm invertebrate communities in treatments without fishes were characterised by more Chironomidae, Culicidae, and Corduliidae.
6. Results suggest that fishes influence invertebrates in habitats that represent important refuges during hydrologic disturbance, hot spots for subsidy exports to riparian food webs, and source areas for colonists during recovery from hydrologic disturbance. Fish effects in these systems include decreasing invertebrate abundance, shifting community structure, and altering patterns of invertebrate emergence and colonisation.

中文翻译：

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鱼类对间歇性避难所中大型无脊椎动物群落和昆虫出苗的影响

1. 干燥间歇性河网经常有永久的避难所，这对于重新定殖很重要。这些生境可能成为鱼类和无脊椎动物之间相互隔离的相互作用的热点，但是这些避难所中鱼类的密度和多样性可能会随时间和空间变化很大。
2. 溪流中的昆虫出现为河岸生境提供了能量和营养补贴。此类补贴的规模可能受到鱼类等上游捕食者的影响。
3. 我们检查了底栖大型无脊椎动物群落，新兴的成虫和永久性草地溪流池中藻类生物量是否在鱼类密度自然不同的地点之间有所不同。我们还在介观实验中操纵了鱼类的密度，以解决鱼类如何从水文扰动恢复过程中影响定居。
4. 鱼类生物量对天然池中无脊椎动物的丰度有负面影响，但对生物量或生物分类丰富度没有负面影响。鱼的总生物量与天然池中昆虫的总数无关，但橙喉飞镖（Etheostoma spectabile）生物量与新兴的拟蝇科生物量和个体中等大小成反比。在我们的模型中，掠食性鱼类生物量和日期之间的相互作用表明，鱼类也可能会延迟自然库中昆虫的出现，从而改变水生－陆地补贴的时间。
5. 随着时间的推移，中膜的藻类生物量（叶绿素a）有所增加，但这在鱼类密度处理之间没有差异。无论如何，鱼类存在于中胚层中会减少定居昆虫的数量和无脊椎动物总生物量。在没有鱼类的处理中，中观无脊椎动物群落的特征是更多的Chi科，Cu科和Cord科。
6. 结果表明，鱼类会影响栖息地的无脊椎动物，这些栖息地是水文干扰期间的重要避难所，向河岸食物网提供补贴出口的热点以及水文干扰恢复期间殖民者的来源地区。在这些系统中，鱼类的影响包括无脊椎动物数量的减少，群落结构的变化以及无脊椎动物的出现和定居模式的改变。