Quantitative evaluation of water-level effects on “regeneration safe-sites” for lakeshore plants in Lake Kasumigaura, Japan

Nishihiro, Jun; Washitani, Izumi

doi:10.1080/07438140902938332

Cited by 10 publications

(6 citation statements)

References 27 publications

(39 reference statements)

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“…However, after heavy rainfalls, the grassland is inundated because of the water level elevation of the lake, which is normally kept at 1.1 m a.s.l. (Nishihiro and Washitani 2009).…”

Section: Study Sitementioning

confidence: 95%

Facilitation of plant species richness and endangered species by a tussock grass in a moist tall grassland revealed using hierarchical Bayesian analysis

Wang

Nishihiro

Washitani

2011

Ecological Research

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Using hierarchical Bayesian analysis, we tested the hypothesis that a perennial tussock grass, Ischaemum aristatum var. glaucum, facilitates the species diversity of vegetation and the regeneration of individual native vascular plants in Ukishima Marsh, a moist tall grassland of eastern Japan. We analyzed microscale distribution patterns of sympatric plant species in response to ground height. Both the species richness of the whole plant assemblage and the occurrence of many native vascular plants, including two endangered species, were positively correlated with ground elevation, which was directly mediated by I. aristatum var. glaucum tussocks and/or the occurrence of mosses on tussocks. Susceptibility to late spring inundation of microsites on the tussocks was significantly lower than that on bare ground. These results suggest that the facilitation by I. aristatum var. glaucum contributes to maintaining the high species richness of the marsh. Consideration of the facilitation among native vascular plants is necessary for establishing sound conservation plans of wetland vegetation.

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“…However, after heavy rainfalls, the grassland is inundated because of the water level elevation of the lake, which is normally kept at 1.1 m a.s.l. (Nishihiro and Washitani 2009).…”

Section: Study Sitementioning

confidence: 95%

Facilitation of plant species richness and endangered species by a tussock grass in a moist tall grassland revealed using hierarchical Bayesian analysis

Wang

Nishihiro

Washitani

2011

Ecological Research

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“…Vallisneria (Li et al, 2018) and is regarded as a key stage during the annual life history of many aquatic plants (Jia, Cao, Yésou, Huber, & Fox, 2017;Nishihiro & Washitani, 2009;Paillisson & Marion, 2011).…”

Section: Reasons For the Tuber Collapsementioning

confidence: 99%

Drivers of a habitat shift by critically endangered Siberian cranes: Evidence from long‐term data

Hou

Liu

Fraser

et al. 2020

Ecology and Evolution

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Many waterbird populations have become increasingly dependent on agricultural habitats for feeding. While habitat destruction has been proposed as a key reason forcing waterbirds to move from natural habitats to agricultural habitats, few have used long‐term data to test this hypothesis. The Siberian crane ( Leucogeranus leucogeranus ) is an IUCN Critically Endangered species. About 98% of its global population winters at Poyang Lake, China. Recently, many cranes shifted from feeding in natural wetlands to agricultural habitats. Here, we integrate bird surveys, Vallisneria tuber (the traditional food of cranes in natural wetlands) surveys, water level data, and remotely sensed images from 1999 to 2016 to explore the drivers of this habitat shift. Changes in Siberian crane numbers in natural wetlands and agricultural fields indicated that the habitat shift occurred in the winters of 2015–2016. Analyses using generalized linear mixed models suggested that crane numbers in natural wetlands were positively related to tuber density and the interaction between dry season (October–March) water level and tuber density. The changes in tuber density and dry season water level in 2015–2016 indicated that tuber disappearance may have been the primary driver of the habitat shift, with a smaller effect of high water level. Submerged plants at Poyang Lake have degraded seriously in the past two decades. The plant degradation at Shahu Lake, a sublake of Poyang Lake, may have been caused by high spring water, high winter temperature, and low summer temperature. However, the drivers of tuber disappearance at Poyang Lake may not be restricted to these variables. Because Poyang Lake is an important refuge for many waterbirds in the Yangtze River floodplain, it is urgent to take effective measures to restore its submerged plants and ecosystem health. Agricultural fields can be important refuges for Siberian cranes, mitigating the negative impacts of wetland deterioration.

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“…Water ecosystem succession is largely governed by the different competitiveness or resistances among biological species and environmental factors. The environmental factors that are involved in the vegetation shifts are complicated and may include nutrient availability, N/P ratio, dissolved inorganic carbon and light availabilities (Twilley et al 1985;Scheffer and Van Nes 2007;Smith and Schindler 2009), climate change (Jeppesen et al 2007;Scheffer and Van Nes 2007), and waterlevel fluctuations (Van Geest et al 2005;Nishihiro and Washitani 2009) or other physical conditions of the lakes (Scheffer and Van Nes 2007). However, much of the information regarding submersed macrophytes loss has been inferred from the indirect effects of eutrophication in waters.…”

Section: Introductionmentioning

confidence: 98%

Growth and turion formation of Potamogeton crispus in response to different phosphorus concentrations in water

et al. 2013

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The vegetative growth and turion formation of Potamogeton crispus, a submersed aquatic macrophyte, was investigated under a range of phosphorus (P) concentrations (0.025, 0.25, 2.5 and 25 mg P L -1 ) in the ambient water free of algae, aiming to identify the responses of submersed aquatic macrophytes to nutrient enrichment, a common eutrophication problem in China and worldwide. Plant growth was not affected by different P concentrations in terms of biomass accumulation of stems and leaves. However, the contents of chlorophyll a and starch in plants decreased with increasing water P levels, whereas chlorophyll b and carotenoids declined with P level ranging from 0.025 to 2.5 mg P L -1 . The soluble sugar content decreased when water P concentration increased up to 2.5 mg L -1 . The P content in plants increased with increasing water P levels, whereas plant N content decreased and soluble protein increased when water P concentration increased over 0.25 mg L -1 , implying that P. crispus may have modified its metabolism to adapt to water P availability. When P concentration increased to 25 mg L -1 , the number and dry matter production of turions per plant decreased significantly. Meanwhile, there was a significant reduction in turion weight and the accumulations of soluble sugar and starch in turion, when water P concentration was over 0.25 mg L -1 . The results suggest that turion formation in P. crispus is sensitive to P concentration in the ambient water, and high P levels may lead to decreases in P. crispus populations due to the decline in turion production.

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Quantitative evaluation of water-level effects on “regeneration safe-sites” for lakeshore plants in Lake Kasumigaura, Japan

Cited by 10 publications

References 27 publications

Facilitation of plant species richness and endangered species by a tussock grass in a moist tall grassland revealed using hierarchical Bayesian analysis

Facilitation of plant species richness and endangered species by a tussock grass in a moist tall grassland revealed using hierarchical Bayesian analysis

Drivers of a habitat shift by critically endangered Siberian cranes: Evidence from long‐term data

Growth and turion formation of Potamogeton crispus in response to different phosphorus concentrations in water

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