沉水大型底栖生物、大型底栖生物和营养物质的添加如何影响热带浮游生物群落?中型宇宙实验

IF 2.2 3区 生物学 Q1 MARINE & FRESHWATER BIOLOGY
Cihelio A. Amorim, Erik Jeppesen, Ariadne N. Moura
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引用次数: 0

摘要

我们研究了操纵沉水大型底栖生物、大型底栖动物和营养物质对热带高富营养化浅水水库浮游生物群落的单独和综合影响。我们使用中置培养箱和八种处理的因子设计(3 × 3),测试了添加大型浮游植物 Ceratophyllum demersum、大型底栖生物 Sarsilatona serricauda 和营养物质对浮游植物和浮游动物多样性、组成和结构的影响。试验期间,水库藻类大量繁殖(生物量为 207 毫克/升),主要由蓝藻组成(占 98%)。研究发现,沉水大型底栖生物能显著降低蓝藻(85%)、硅藻(80%)和绿藻(78%)的生物量,而添加浮游动物和营养物质则能使硅藻的生物量降低 96%。虽然沉水大型底栖生物和添加的衣藻都会影响本地浮游动物群落,但大型底栖生物对浮游植物和浮游动物的多样性、组成和结构的影响更大。耐人寻味的是,营养物质的添加并没有改变大型底栖生物的主要影响。我们的研究结果表明,在热带浅水湖泊中引入沉水大型底栖生物,即使只占湖泊容积的较低或中等比例,也有控制有毒蓝藻藻华的积极潜力。在我们的实验条件下,即使没有浮游动物的额外捕食,在增加营养输入的情况下,该方法也是有效的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

How do additions of submerged macrophytes, large-bodied cladocerans and nutrients impact tropical plankton communities? A mesocosm experiment

How do additions of submerged macrophytes, large-bodied cladocerans and nutrients impact tropical plankton communities? A mesocosm experiment

We investigated the individual and combined impacts of manipulation of submerged macrophytes, large-bodied cladocerans, and nutrients on plankton communities in a tropical hypereutrophic shallow reservoir. We tested how the addition of the macrophyte Ceratophyllum demersum, the cladoceran Sarsilatona serricauda, and nutrients affected phytoplankton and zooplankton diversity, composition, and structure using mesocosms and a factorial design (3 × 3) with eight treatments. During the experiment, the reservoir experienced an intense bloom of algae (207 mg l−1 of biomass), mainly composed of cyanobacteria (> 98%). The submerged macrophytes were found to significantly reduce the biomass of cyanobacteria (by 85%), diatoms (80%), and green algae (78%), while the addition of zooplankton and nutrients led to a 96% reduction for diatoms. While both submerged macrophytes and the added cladocerans impacted the native zooplankton community, the macrophytes exerted stronger effects on phytoplankton and zooplankton diversity, composition, and structure. Intriguingly, nutrient addition did not alter the main effects of macrophytes and large cladocerans. Our findings reveal the positive potential of introducing submerged macrophytes in tropical shallow lakes, even at a low to moderate percentage of the volume inhabited, to control toxic cyanobacterial blooms. Under our experimental conditions, the method was effective even without extra zooplankton grazing and at increased nutrient input.

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来源期刊
Hydrobiologia
Hydrobiologia 生物-海洋与淡水生物学
CiteScore
5.40
自引率
11.50%
发文量
288
审稿时长
4.9 months
期刊介绍: Hydrobiologia publishes original research, reviews and opinions regarding the biology of all aquatic environments, including the impact of human activities. We welcome molecular-, organism-, community- and ecosystem-level studies in contributions dealing with limnology and oceanography, including systematics and aquatic ecology. Hypothesis-driven experimental research is preferred, but also theoretical papers or articles with large descriptive content will be considered, provided they are made relevant to a broad hydrobiological audience. Applied aspects will be considered if firmly embedded in an ecological context.
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