Hydrologic and anthropogenic influences on aquatic macrophyte development in a large, shallow lake in China
Hydrologic and anthropogenic influences on aquatic macrophyte development in a large, shallow lake in China
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水文和人为因素对中国大型浅水湖泊水生植物发育的影响
DOI：
10.1111/fwb.13263
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发表时间：
2019-04
影响因子：
2.7
通讯作者：
Jeppesen Erik
中科院分区：
文献类型：
--
作者：
Zhang Qinghui;Dong Xuhui;Yang Xiangdong;Odgaard Bent Vad;Jeppesen Erik
大型水生植物的组成和丰度影响湖泊的整体生态结构和功能，因此，有关大型水生植物群落变化的性质和时间的信息对于理解它们对湖泊生态系统的影响至关重要。我们
Macrophyte composition and abundance affect the overall ecological structure and function of lakes, and information on the nature and timing of changes in macrophyte assemblages is therefore crucial for understanding their impact on the lake ecosystem. We examined plant macrofossils, diatoms, cladocerans, and physical and geochemical proxies in two sediment cores from Lake Liangzi, a large shallow lake located on the Yangtze floodplain in south‐east China, in order to assess recent and historical trajectories of ecological and environmental change. We also used archival records of environmental changes (i.e. hydrological, climatic, fishery, and social factors) in the lake and its catchment. Lake Liangzi is of particular interest as it, unlike most other lakes in the region, has maintained a macrophyte‐dominated state. The results revealed a shift in the lake during the past ca. 160 years from a clear water, low‐growing submerged macrophyte community (e.g. Najas minor, charophyte species), dominated by planktonic diatoms and planktonic cladocerans, towards a more pollutant‐resistant, tall‐growing macrophyte community (Potamogeton spp., Ceratophyllum demersum and Myriophyllum spicatum) and dominance by benthic and epiphytic diatoms and littoral cladocerans. However, a pronounced increase in the abundance of planktonic Bosmina spp. at the expense of true littoral cladoceran species and a decline in plant macrofossil assemblages in the surface samples suggest that the lake recently entered into a new unprecedented state. Redundancy analysis indicated major changes in hydrology and moderate inputs of anthropogenic pollutants as well as climate warming as the main drivers of ecological and environmental changes in the lake. Our study demonstrated that plant macrofossils from radionuclide‐dated short sediment cores provide reliable information on the nature and timing of changes in the macrophyte community in Lake Liangzi. Furthermore, our study provided information on the composition of the plant community before recent strong perturbations and also showed the trajectories and suggested the drivers of ecological and environmental change, thereby offering valuable information for lake managers in the Yangtze region and elsewhere. Our study identifies a relatively resistant community of submerged macrophytes, which may be an initial restoration target for managers when restoring the many lakes in the region where submerged vegetation coverage has declined during the last few decades.
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DOI：
10.1016/j.scitotenv.2017.11.181
发表时间：
2018-04
期刊：
The Science of the total environment
影响因子：
--
作者：
Linghan Zeng-;S. McGowan;Yanmin Cao;Xu Chen
通讯作者：
Linghan Zeng-;S. McGowan;Yanmin Cao;Xu Chen
DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
T. Braak;F. Cateten;P. Šmilauer
通讯作者：
T. Braak;F. Cateten;P. Šmilauer
影响因子：
2.1
作者：
R. Owen;R. Crossley
通讯作者：
R. Owen;R. Crossley
影响因子：
2.1
作者：
O. Babanazarova;O. Lyashenko
通讯作者：
O. Babanazarova;O. Lyashenko
影响因子：
2.7
作者：
P. Richoux
通讯作者：
P. Richoux