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首页> 外文期刊>Hydrobiologia >Are cladoceran diversity and community structure linked to spatial heterogeneity in urban landscapes and pond environments?
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Are cladoceran diversity and community structure linked to spatial heterogeneity in urban landscapes and pond environments?

机译：枝角类动物的多样性和社区结构是否与城市景观和池塘环境中的空间异质性联系在一起？

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摘要

Biodiversity patterns in cladoceran communities were investigated in urban waterbodies in relation with residential land use, pond management, and waterbody environments. We evaluated species richness in the pelagic and littoral zones of eighteen waterbodies of a large Canadian city. Gamma diversity (26 species) observed at a small scale in the urban survey was important comparatively to large-scale surveys of lakes. Beta diversity ranged from 1 to 8 species among waterbodies. We tested if littoral species greatly contributed to regional diversity in urban waterbodies. Littoral species (Chydoridae, Ilyocryptidae, Macrothricidae, Polyphemidae) accounted for 58% of the total species pool. We distinguished five cladoceran assemblages associated to different waterbodies (temporary ponds, permanent lakes, and wetlands). Cladoceran communities were more diverse and variable in permanent lakes than in temporary ponds. Changes in cladoceran species assemblages among waterbodies were driven by variations in waterbody size and phosphorus enrichment, macrophyte and algal biomass, urban density, pond management practices, and the presence of potential predators as fish and macroinvertebrates. Our study indicates that both artificial ponds and lakes and natural wetlands are valuable habitats for the conservation of cladoceran biodiversity and rare endemic species in urban regions. Further research on pond management strategies promoting urban aquatic biodiversity should be undertaken.
机译：在城市水体中，与生活用地，池塘管理和水体环境有关，研究了锁骨群落的生物多样性模式。我们评估了加拿大大城市十八个水域的中上层和沿海地区的物种丰富度。与大规模的湖泊调查相比，在城市调查中小规模观测到的伽玛多样性（26种）相对重要。在水体中，Beta多样性范围从1到8种。我们测试了沿海物种是否在很大程度上促进了城市水体的区域多样性。沿海物种（虎科，鳞翅目科，Macrothricidae，Poly科）占总物种库的58％。我们区分了与不同水体（临时池塘，永久性湖泊和湿地）相关的五个锁骨组合。与永久性池塘相比，永久性湖泊中的角藻群落更加多样化和多变。水体中的角藻种类组合的变化是由水体大小和磷富集，大型植物和藻类生物量，城市密度，池塘管理做法的变化以及鱼类和大型无脊椎动物的潜在天敌的存在所驱动的。我们的研究表明，人工池塘和湖泊以及自然湿地都是保护城市地区锁骨生物多样性和稀有特有物种的宝贵栖息地。应进一步研究促进城市水生生物多样性的池塘管理战略。

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