Effects of local and landscape factors on exotic vegetation in the riparian zone of a regulated river: Implications for reservoir conservation

Chen, Chundi; Wu, Shengjun; Meurk, Colin D.; Ma, Maohua; Jiancheng, Zhao; Lv, Meng; Tong, Xiaoxiao

doi:10.1016/j.landurbplan.2016.06.003

Cited by 35 publications

(11 citation statements)

References 60 publications

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“…This recent increase in N availability may further facilitate the invasion of S. canadensis and endanger the native species, primarily in the middle‐lower Yangtze River and South‐eastern coastal area of China. Also, with the nutrient enhancement from anthropogenic and natural disturbance, riparian zones of rivers are particularly susceptible to species invasion (Chen et al, 2017). For example, the proportion of the flora composed of alien species in riparian zones is reported as ranging from 20 to 30% in South Africa, USA, and France (Hood & Naiman, 2000) to 40% in Arizona, and as high as 60% in New Zealand (Truscott, Palmer, Soulsby, & Hulme, 2007).…”

Section: Discussionmentioning

confidence: 99%

The effect of nitrogen and temperature changes on Solidago canadensis phenotypic plasticity and fitness

Ren

Hong-yuan

et al. 2020

Plant Species Biology

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Section: Discussionmentioning

confidence: 99%

The effect of nitrogen and temperature changes on Solidago canadensis phenotypic plasticity and fitness

Ren

Hong-yuan

et al. 2020

Plant Species Biology

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“…This anthropogenic impact leads to reduced flow magnitude, altered frequency and inverted seasonal flow patterns [108], which could have also benefited A. donax expansion [109]. Dam management should implement a more natural high flow timing and frequency to simulate the natural seasonal variation of flow regime, so benefiting ecological integrity and diminishing invasion risks [110,111]. In this context, it should be stressed that the project LIFE + RIPISILVANATURA has attempted, albeit partially, to face invasion drivers through the implementation of complementary actions to restoration measures, such as the removal of unnecessary river embankments to recover lateral connectivity, demarcation of public waters and riparian areas, creation of a land stewardship network, and a public alert system for early detection of fire and invasive species.…”

Section: Management Implicationsmentioning

confidence: 99%

Short-Term Responses of Aquatic and Terrestrial Biodiversity to Riparian Restoration Measures Designed to Control the Invasive Arundo donax L.

Bruno

Zapata

Guareschi

et al. 2019

Water

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Invasive species are among the top five causes of biodiversity loss worldwide. Arundo donax has progressively colonized the riparian zones of Mediterranean rivers with detrimental effects on terrestrial and aquatic biodiversity, being catalogued as one of the 100 worst invasive species. In order to control this invasive species and restore native riparian vegetation, different methods have been traditionally used, depending on the environmental, economic and social context. Here, the effect of repeated above-ground removal of A. donax on aquatic and terrestrial communities was assessed by testing two different frequencies of mowing (monthly-intensive and quarterly-extensive), combined with the plantation of native species. Specifically, it was evaluated if riparian vegetation, birds and aquatic macroinvertebrates showed significant responses throughout time and between restoration treatments based on 4-year annual biomonitoring data (2015–2018). Changes in taxonomic diversity and ecological quality indices for the different biological communities were tested using mixed-effect models (LMEs). Similarly, comparisons between restored and reference sites were also performed. LMEs were also applied to assess how riparian variables were related to bird and aquatic macroinvertebrate indices. NMDS and MGLM-Mvabund analyses were performed to detect significant post-treatment differences in taxa composition compared to the initial state and reference sites. During this short-term assessment, increases in riparian and aquatic macroinvertebrate richness and quality indices were found, as well as significant decreases in A. donax height, density and cover, without significant differences between restoration treatments. However, differential effects between extensive (positive-neutral effect) and intensive treatments (neutral-negative effect) were detected for bird richness, density and abundance. After three years of restoration actions, restored sites are still far from reference values in terms of taxa composition, species richness and ecological quality, especially for riparian vegetation and birds. Given the high cost and the great efforts required for restoration, extensive repeated mowing, together with native species plantation, are only recommended on river reaches not fully invaded by A. donax and with a high ecological interest.

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“…; Chen et al. ). Agriculture, specifically N enrichment, has also been associated with a reduction in overall floristic quality of riparian and aquatic vegetation and with an increase in fast‐growing, weedy species of low conservation value (Dalton et al.…”

Section: Introductionmentioning

confidence: 99%

Factors affecting soil seed banks of riparian communities in an agricultural ecosystem: potential for conservation of native plant diversity

Dalton

Carpenter

Boutin

et al. 2017

Applied Vegetation Science

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Questions Do agricultural land use and nitrogen (N) enrichment have negative effects on riparian soil seed banks? What is the potential of the soil seed bank for the conservation and restoration of native riparian plant diversity? Are non‐native dominant grass species affected by agriculture and do they affect species richness? Location South Nation River watershed (an agricultural watershed), Ontario, Canada. Methods We examined the riparian above‐ground vegetation at 24 sites located across a large (~4000 km2) North American watershed and identified the corresponding soil seed bank composition from soil cores using the seedling emergence method. The above‐ground vegetation and soil seed bank species compositions were compared in terms of species richness, percentage of non‐native species and a floristic quality index. Factors affecting these descriptors of plants communities (concentration of in‐stream nitrate and percentages of surrounding natural habitat and annual crop land) were assessed. The effects of agriculture on two dominant non‐native grasses species and their effects on species richness were also assessed. Results In total, 274 plant taxa were identified, including 181 taxa in the soil seed bank and 231 taxa in the vegetation. Overall species richness was high in both the soil seed bank and above‐ground vegetation and was unaffected by measures of agricultural intensity (surrounding annual crop land and N enrichment). Above‐ground vegetation species richness was strongly negatively affected by the widespread and dominant non‐native grasses, Phalaris arundinacea and Bromus inermis, whereas soil seed bank species richness was unaffected. The community compositions of both the soil seed bank and vegetation were negatively affected by the loss of natural habitat and by N enrichment. In fact, an increase in the percentage of non‐native species and a decrease in floristic quality were observed along a gradient of agricultural intensity. Conclusions Species richness of the soil seed bank demonstrated resilience to invasions by P. arundinacea and B. inermis, and the soil seed bank showed good potential for conservation of taxonomic diversity. However, the loss of natural habitat and N enrichment had negative effects on the soil seed bank community composition that may lead to an eventual decline in above‐ground species richness.

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Effects of local and landscape factors on exotic vegetation in the riparian zone of a regulated river: Implications for reservoir conservation

Cited by 35 publications

References 60 publications

The effect of nitrogen and temperature changes on Solidago canadensis phenotypic plasticity and fitness

The effect of nitrogen and temperature changes on Solidago canadensis phenotypic plasticity and fitness

Short-Term Responses of Aquatic and Terrestrial Biodiversity to Riparian Restoration Measures Designed to Control the Invasive Arundo donax L.

Factors affecting soil seed banks of riparian communities in an agricultural ecosystem: potential for conservation of native plant diversity

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