Effects of land use on aquatic macrophyte diversity and water quality of ponds
Effects of land use on aquatic macrophyte diversity and water quality of ponds
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DOI：
10.1111/j.1365-2427.2009.02334.x
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发表时间：
2010-04-01
影响因子：
2.7
通讯作者：
Kadono, Yasuro
中科院分区：
文献类型：
--
作者：
Akasaka, Munemitsu;Takamura, Noriko;Kadono, Yasuro
1. 日本西部 55 个池塘的水生植物多样性和水质与土地利用和形态变量相关，以确定维持生物多样性的环境因素以及这些因素发挥作用的空间范围。2．浮叶植物丰富度的相关空间范围（距离池塘边缘 500 m）大于沉水植物发生的相关空间范围（10、75 和 100 m），而挺水植物丰富度在更大的范围（1000 m）得到了最好的解释。大型植物总丰富度在 500、750 和 1000 m 范围内得到解释。解释池塘水体理化条件的相关程度（100和250 m）与沉水和浮叶植物相似，表明这两种生长形式比挺水植物对水质更敏感。3．所有三种生长形式的多样性以及总大型植物的多样性与浊度和养分浓度呈负相关；三种生长形式中，沉水植物受水质影响最大。 4．城市面积比例与三种生长形式多样性、水生植物总数和水质呈负相关。挺水植物、浮叶植物和总大型植物的物种丰富度随着深度的增加而降低，随着表面积的增加而增加，直到5000 m(2)左右，超过5000 m(2)后物种丰富度下降。5．城市化和池塘扩大是灌溉池塘水生植物多样性下降的两个主要因素。为了减轻城市地区对水生植物多样性的不利影响，我们的研究结果表明，管理工作应侧重于在池塘边缘相关空间范围内创建缓冲区。
1. Aquatic macrophyte diversity and water quality of 55 ponds in western Japan were related to land use and morphometric variables to identify the environmental factors that sustain biodiversity and the spatial extent at which these factors operate.2. The relevant spatial extent for floating-leaved macrophyte richness (500 m from pond edge) was larger than that for submerged macrophyte occurrence (10, 75 and 100 m), whereas emergent macrophyte richness was best explained at much larger extents (1000 m). Total macrophyte richness was explained at the extent of 500, 750 and 1000 m. The extents relevant for explaining the physicochemical condition of pond water (100 and 250 m) were similar to those for submerged and floating-leaved macrophytes, suggesting that these two growth forms are more sensitive to water quality compared to emergent macrophytes.3. Diversity of all three growth forms and that of total macrophytes collectively were inversely related to turbidity and nutrient concentration; among the three growth forms, submerged macrophytes were most affected by water quality.4. Negative relationships were found between the proportion of urban area and the diversity of the three growth forms and that of total macrophytes and water quality. Species richness of emergent, floating-leaved and total macrophytes decreased with depth and increased with surface area up to about 5000 m(2), above which it declined.5. Urbanisation and enlargement of ponds were the two main factors that decreased aquatic macrophyte diversity in irrigation ponds. To alleviate the adverse effects of urban areas on aquatic macrophyte diversity, our results suggest that management efforts should focus on the creation of buffer zones within the relevant spatial extent from the pond edge.