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Naskar M, Das Sarkar S, Sahu SK, Gogoi P, Das BK. Impact of barge movement on phytoplankton diversity in a river: A Bayesian risk estimation framework. J Environ Manage 2021; 296:113227. [PMID: 34261034 DOI: 10.1016/j.jenvman.2021.113227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 06/07/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
The adverse effect of barge movement on the river's aquatic ecosystem is of global concern. The phytoplankton community, a bioindicator, is possibly the foremost victim of the barge movement. This study hypothesized phytoplankton diversity loss induced by barge movement in a large river. This article presents a novel risk assessment framework to evaluate the hypothesis-with a goal to uncoupling phytoplankton diversity loss due to barge movement over a spatiotemporal scale. For this purpose, a study was conducted in the Bhagirathi-Hooghly stretch of Inland National Waterway 1 of India. This study has proposed a new index of diversity loss and its inferential framework based on full Bayesian Generalized Linear Mixed Model. The results have diagnosed significant barge-induced impact on the phytoplankton diversity and identified ten most impacted species. The proposed framework has successfully disentangled barge-induced phytoplankton diversity loss from the biological process and predicted a substantive overall risk of phytoplankton loss of 31.44%. Besides, it has uncoupled spatiotemporal differential estimates, suggesting a risk of diversity loss in order of 'During vs After' (38.0%) > 'Before vs After' (30.7%) > 'Before vs During' (24%) barge movement in temporal scale and increasing diversity loss along downstream. Finally, the instant study has highlighted the utility of these results to facilitate better water framework directive for inland waterways.
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Affiliation(s)
- Malay Naskar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India.
| | - Soma Das Sarkar
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - S K Sahu
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - Pranab Gogoi
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
| | - B K Das
- ICAR-Central Inland Fisheries Research Institute, Barrackpore, Kolkata, West Bengal, India
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Molnár T, Benedek I, Kovács B, Zsolnai A, Lehoczky I. Genetic consequences of pond production of a pikeperch ( Sander lucioperca L.) stock with natural origin: the effects of changed selection pressure and reduced population size. PeerJ 2020; 8:e8745. [PMID: 32211234 PMCID: PMC7083162 DOI: 10.7717/peerj.8745] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Accepted: 02/13/2020] [Indexed: 11/20/2022] Open
Abstract
The pikeperch (Sander lucioperca L.) possesses great potential for diversifying European aquaculture. However, studies on the genetic risk of stocking natural waters with farmed individuals of this species have been limited. Even the effect of pond culture on the genetic composition of stocks with natural-origin has not yet been determined. Our study aimed to compare the genetic variability of a wild living pikeperch population, a pond cultured broodstock (originating from the wild population) and its offspring generation. We also aimed to detect the potential signs of selection using three different methods. By analyzing the molecular data with 14 microsatellite markers, we illustrated that the impact of pond culture on the genetic diversity of fish stocks is similar to hatchery rearing due to its diversity reducing effect caused by using lower effective population sizes. Although the heterozygosity was similar in all populations (Ho = 0.68–0.71), the average number of alleles and allelic richness were significantly lower in the pond cultured stocks (NA = 7.5 and 6; AR = 7.5 and 5.9) compared to the wild population (NA = 11.00, AR = 10.47). Despite the semi-natural conditions of the present study, we detected changing selection pressure in one of the 14 microsatellite markers.
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Affiliation(s)
- Tamás Molnár
- Institute of Environmental Sciences and Nature Conservation, Kaposvár University, Kaposvár, Hungary.,Department of Aquaculture, Szent István University, Gödöllő, Hungary.,Institute for Farm Animal Gene Conservation, National Centre for Biodiversity and Gene Conservation, Gödöllő, Hungary
| | - Ildikó Benedek
- Institute of Environmental Sciences and Nature Conservation, Kaposvár University, Kaposvár, Hungary
| | - Balázs Kovács
- Department of Aquaculture, Szent István University, Gödöllő, Hungary
| | - Attila Zsolnai
- Research Institute for Animal Breeding, Nutrition and Meat Science (ATHK), National Agricultural Research and Innovation Centre, Herceghalom, Hungary
| | - István Lehoczky
- Institute for Farm Animal Gene Conservation, National Centre for Biodiversity and Gene Conservation, Gödöllő, Hungary
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Liu J, Cui Y, Li X, Wilsey BJ, Isbell F, Wan S, Wang L, Wang D. Reversal of nitrogen-induced species diversity declines mediated by change in dominant grass and litter. Oecologia 2018; 188:921-929. [PMID: 30143873 DOI: 10.1007/s00442-018-4252-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/20/2018] [Indexed: 10/28/2022]
Abstract
Atmospheric nitrogen (N) deposition reduces plant diversity. However, it often remains unclear how dominant species and litter accumulation feedbacks mediate N-induced plant diversity declines. We tested mechanisms of N-induced diversity change through dominant grasses and litter in a 7-year field experiment. Nitrogen addition reduced species richness, Shannon-Wiener diversity (H') and evenness from the second to the fourth year, however, surprisingly, increased them in the sixth and seventh year. The reversal in the response of diversity to N addition was explained by changes in grass dominance and standing litter accumulation. The diversity recovery during later years in fertilized plots was attributed to a decrease in the dominant grass and an increase in standing litter: standing litter reduced bud numbers of the dominant grass by decreasing light availability. The decreased light availability by standing litter reduced completion from the dominant species, which resulted in diversity increase. The negative feedback between dominant grasses and standing litter led to transient N-induced diversity loss in the short-term, but recovery of plant diversity in the long-term. Grassland management that affects litter accumulation, such as firing, grazing and mowing, can therefore, have substantial effects on the long-term response of plant diversity to N deposition.
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Affiliation(s)
- Jushan Liu
- Key Laboratory of Vegetation Ecology, School of Environment, Institute of Grassland Science, Northeast Normal University, Ministry of Education, Changchun, 130024, China
| | - Yao Cui
- Key Laboratory of Vegetation Ecology, School of Environment, Institute of Grassland Science, Northeast Normal University, Ministry of Education, Changchun, 130024, China
| | - Xiaofei Li
- Key Laboratory of Vegetation Ecology, School of Environment, Institute of Grassland Science, Northeast Normal University, Ministry of Education, Changchun, 130024, China
| | - Brian J Wilsey
- Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, 50011, USA
| | - Forest Isbell
- Department of Ecology, Evolution and Behavior, University of Minnesota, Saint Paul, MN, 55108, USA
| | - Shiqiang Wan
- Key Laboratory of Plant Stress Biology, College of Life Sciences, Henan University, Kaifeng, 475004, China
| | - Ling Wang
- Key Laboratory of Vegetation Ecology, School of Environment, Institute of Grassland Science, Northeast Normal University, Ministry of Education, Changchun, 130024, China
| | - Deli Wang
- Key Laboratory of Vegetation Ecology, School of Environment, Institute of Grassland Science, Northeast Normal University, Ministry of Education, Changchun, 130024, China.
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Lv W, Liu Z, Yang Y, Huang Y, Fan B, Jiang Q, Zhao Y. Loss and self-restoration of macrobenthic diversity in reclamation habitats of estuarine islands in Yangtze Estuary, China. Mar Pollut Bull 2016; 103:128-136. [PMID: 26746380 DOI: 10.1016/j.marpolbul.2015.12.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 12/19/2015] [Accepted: 12/21/2015] [Indexed: 06/05/2023]
Abstract
In this study, macrobenthic diversity data were collected from intertidal habitats of island wetlands in Yangtze Estuary before and after reclamation. Three survey regions based on habitat features were investigated: protected region, normal region, and self-restored region. The pattern of diversity variation showed a sharp decrease in reclamation sites and an obvious increase in vegetated sites of the self-restored region before and after reclamation. A declining trend in habitat health was observed in reclamation sites, but the degree of perturbation was relatively weaker in protected region than in normal region. The vegetated site showed a better self-restoration of biodiversity than the bald site. These results suggest that reclamation may have a negative influence on biodiversity and habitat health status in the intertidal wetland. Also, there is a possibility of self-restoration in tidal flats disturbed by reclamation and the resistance effect in nature reserve may reduce the disturbances resulting from reclamation.
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Affiliation(s)
- Weiwei Lv
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Zhiquan Liu
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Yang Yang
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Youhui Huang
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Bin Fan
- School of Life Science, East China Normal University, Shanghai 200241, China
| | - Qichen Jiang
- Shanghai National Engineering Research Center of Urban Water Resources Co.Ltd., Shanghai 200082, China
| | - Yunlong Zhao
- School of Life Science, East China Normal University, Shanghai 200241, China.
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