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首页> 外文期刊>Southeastern naturalist >Water Chemistry and Aquatic Insect Assemblages of Ephemeral Ponds in the Munson Sand Hills Region of the Apalachicola National Forest, Florida
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Water Chemistry and Aquatic Insect Assemblages of Ephemeral Ponds in the Munson Sand Hills Region of the Apalachicola National Forest, Florida

机译：佛罗里达州Apalachicola国家森林蒙阳山区蒙森池区的水化学和水产昆虫组合

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Ephemeral ponds in the Munson Sand Hills region (MSH) of Apalachicola National Forest (ANF) are an essential resource in the life cycles of a variety of amphibian species, a number of which are threatened or endangered. Various types of human activities have disturbed some of these ponds threatening their survival. Although extensive research has been done on the biology of amphibians in the ponds, little is known of the invertebrates and to what extent the water quality may be affected by human impacts. We monitored 4 ponds, representing a spectrum of sizes, natural settings, and anthropogenic disturbance, in terms of water chemistry and aquatic insect assemblages seasonally for 2 years. Pond waters were characterized by acidic pH, low ionic strength, low buffering capacity, low nutrient concentrations, and phosphorus-limiting conditions. The water quality of studied ponds was similar to those reported for natural wetlands in west-central Florida. The chemistry, as compared to a nearby sinkhole, indicated that these ponds were mainly recharged with rain and had no connectivity to groundwater. Aquatic beetles (Coleoptera), dragonflies and damselflies (Odonata), and aquatic bugs (Heteroptera) were the most diverse groups of aquatic insects recorded. Species collected included many common, predatory species adapted to exploit resources in fishless, temporary ponds. Water chemistry and aquatic insect composition showed minor spatial-temporal variations among ponds. The results of this study indicate that human disturbances have not had a significant effect on pond water quality, posing no threat to amphibian and other wildlife species, and the sampled ponds had abundant and diverse aquatic insect fauna. The aquatic insect assemblages documented in this study provide evidence that pond type and the top-down effects of aquatic insects as predators are important determinants of community structure, which is a common theme observed in temporary ponds found in other regions within temperate biomes.
机译：Apalachicola国家森林（ANF）的蒙阳山区（MSH）中的短暂池是各种两栖物种的生命周期的重要资源，其中一些受到威胁或濒临灭绝的。各种类型的人类活动使这些池塘中的一些威胁他们的生存。虽然在池塘的两栖动物生物学中已经进行了广泛的研究，但众所周知，无脊椎动物，水质可能受到人类影响的程度。我们监控了4个池塘，代表了尺寸，自然环境和人为干扰的频谱，在水化学和水生昆虫组合季节性方面持续了2年。池塘水的特征是酸性pH，低离子强度，低缓冲能力，低营养浓度和磷的限制条件。学习池塘的水质类似于佛罗里达州西部西部的天然湿地的水质。与附近的污水孔相比，化学表明，这些池塘主要用雨充电，并没有与地下水的连接。水生甲虫（鞘翅目），蜻蜓和蜻蜓（Odonata）和水生虫（Huseroptera）是记录的最多不同的水生昆虫。收集的物种包括许多常见的掠夺性物种，适用于禁鱼，临时池塘中的资源。水化学和水生昆虫组成在池塘中显示出轻微的空间变化。本研究的结果表明，人类紊乱对池塘水质没有显着影响，对两栖动物和其他野生动物种类没有威胁，采样的池塘具有丰富而多样化的水生昆虫动物粪便。本研究中的水生昆虫组合提供了证据，即池塘类型和水生昆虫作为捕食者的自上而下效果是社区结构的重要决定因素，这是在温带生物群体中的其他地区发现的临时池塘中观察到的共同主题。

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