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Zhou X, Xu M, Wang Z, Yu B, Shao X. Responses of macroinvertebrate assemblages to environmental variations in the river-oxbow lake system of the Zoige wetland (Bai River, Qinghai-Tibet Plateau). THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 659:150-160. [PMID: 30597465 DOI: 10.1016/j.scitotenv.2018.12.310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 06/09/2023]
Abstract
The biodiversity value of river-oxbow lake systems in high plateau peatland has been little recognized, and there are many gaps in our understanding of their ecology. In this study, we investigated the river-oxbow lake system of the Bai River basin, the main tributary of the Yellow River Source in the Zoige wetland from 2015 to 2016, in attempt to show how the environmental variations, especially hydrological connectivity and macrophyte biomass in the river-oxbow lake system influenced macroinvertebrates. Habitat patches were investigated in 11 river cross-sections and 18 oxbow lakes in the Bai River basin. Through hierarchical clustering and non-metric multidimensional scaling, four main types of habitats were identified in the river-oxbow lake system in the plateau: sand-bed river, cobble-bed river, sparse-macrophyte oxbow lake, and luxuriant-macrophyte oxbow lake. The luxuriant-macrophyte oxbows were characterized by high dissolved oxygen concentrations, alkalinity, and higher macroinvertebrate richness, density, biomass, and the Improved Shannon-Wiener Index in comparison to the other habitat types. Additionally, influential patterns of environmental variables on macroinvertebrates were analyzed using redundancy analysis. Lasso regression models were established to describe how macroinvertebrate density responded to macrophyte biomass and other variables, and how macrophyte biomass responded to hydrological connectivity and oxbow size. It was revealed that reduced hydrological connectivity and reduced oxbow size played important roles in increasing the biomass of submerged macrophyte, and dense macrophyte was directly responsible for the high biodiversity of macroinvertebrates. Different from the commonly believed unimodal influential pattern that medium hydrological connectivity supports the highest biodiversity in oxbow lakes reported in previous studies, macroinvertebrates in the high plateau river-oxbow lake systems benefited from low connectivity and reduced size. Oxbow lakes, especially those covered with luxuriant macrophytes, diversified the macroinvertebrate assemblages and enhanced primary consumer biomass at the regional scale.
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Affiliation(s)
- Xiongdong Zhou
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
| | - Mengzhen Xu
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China.
| | - Zhaoyin Wang
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
| | - Bofu Yu
- Australian Rivers Institute and School of Engineering, Griffith University, Nathan, Qld 4111, Australia
| | - Xuejun Shao
- State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
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Ledo RMD, Colli GR. Silent Death: The New Brazilian Forest Code Does not Protect Lizard Assemblages in Cerrado Riparian Forests. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2016. [DOI: 10.2994/sajh-d-16-00025.1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Pinheiro LT, Rodrigues JFM, Borges-Nojosa DM. Formal education, previous interaction and perception influence the attitudes of people toward the conservation of snakes in a large urban center of northeastern Brazil. JOURNAL OF ETHNOBIOLOGY AND ETHNOMEDICINE 2016; 12:25. [PMID: 27324788 PMCID: PMC4915046 DOI: 10.1186/s13002-016-0096-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Accepted: 06/05/2016] [Indexed: 05/31/2023]
Abstract
BACKGROUND The attitudes and perceptions of people toward animals are influenced by sociodemographic factors, such as formal education and gender, and by personal experience. Understanding these interactions is critical for the establishment of conservation strategies for animals that have conflictual relationships with humans, such as snakes. Our study aims to explain how perceptions and the human fear of snakes vary and are influenced by formal education and gender. In addition, it aims to show how prior interaction with these animals influence these perceptions and the human fear toward snakes and how these perceptions and fear influence the importance of conservation of these animals. METHODS We collected data from June 2010 to December 2013 using questionnaires given to 1142 visitors of a scientific serpentarium (Núcleo Regional de Ofiologia da Universidade Federal do Ceará) in the municipality of Fortaleza, northeastern Brazil. RESULTS AND DISCUSSION Negative perceptions toward snakes were less frequent according to an increase in levels of schooling. Women had more negative perceptions and were more afraid of snakes than were men. Prior interaction with snakes decreased the occurrence of negative perceptions and reduced the level of human fear of these animals. People with negative perceptions classified the conservation of snakes as not important and were more afraid of these animals. Understanding the relationship between sociodemographic factors, prior experiences, perceptions, fear, and the importance given to conservation can help to better understand human attitudes toward snakes. CONCLUSIONS Environmental education activities considering gender differences, involving preliminary interaction with snakes and focusing on priority targets identified in our study, such as people with low formal education, can increase the efficiency of measures for the conservation of these animals.
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Affiliation(s)
- Luan Tavares Pinheiro
- />Núcleo Regional de Ofiologia da Universidade Federal do Ceará (NUROF-UFC), Depto. Biologia, Universidade Federal do Ceará, Campus do Pici, Fortaleza, CE 60440-554 Brazil
- />Programa de Pós-Graduação em Biologia de Vertebrados, Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, MG 30535-610 Brazil
| | - João Fabrício Mota Rodrigues
- />Núcleo Regional de Ofiologia da Universidade Federal do Ceará (NUROF-UFC), Depto. Biologia, Universidade Federal do Ceará, Campus do Pici, Fortaleza, CE 60440-554 Brazil
- />Programa de Pós-Graduação em Ecologia e Evolução, Departamento de Ecologia, Instituto de Biociências da Universidade Federal de Goiás, Goiânia, GO 74001-970 Brazil
| | - Diva Maria Borges-Nojosa
- />Núcleo Regional de Ofiologia da Universidade Federal do Ceará (NUROF-UFC), Depto. Biologia, Universidade Federal do Ceará, Campus do Pici, Fortaleza, CE 60440-554 Brazil
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Vignatti AM, Cabrera GC, Echaniz SA. Biology of Boeckella poopoensis Marsh, 1906 (Copepoda, Calanoida) in natural conditions in temporary saline lakes of the central Argentina. BIOTA NEOTROPICA 2016. [DOI: 10.1590/1676-0611-bn-2015-0063] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Boeckella poopoensis Marsh, 1906 is the dominant copepod in saline lakes from northern Patagonia to southern Peru. It is a tolerant species, which has been registered at salinities between 20 and 90 g.L-1, and is important because it integrates the diet of flamingos and fishes of commercial and sport interest. The aims of this study were to analyze the characteristics of populations of B. poopoensis in the central region of Argentina and to establish their relationships with environmental parameters. Monthly samples during 2007 were taken in four temporary lakes of La Pampa province. Environmental parameters and density, size, biomass, number and size of eggs were determined. The salinity ranged between 13.38 and 32.90 g.L-1. In three lakes that had previously continuously contained water, B. poopoensis was registered throughout the whole study. In the fourth lake, which was filled in January, it was present only when salinity exceeded 15 g.L-1. The population of the lake that was filled differed from that of the other lakes in terms of the density and biomass of adults and copepodites. The number of ovigerous females represented a higher percentage of the population during the colonization of the lake that had been dried and these produced the highest number of eggs. In the three lakes in which B. poopoensis was always recorded, its characteristics were more influenced by the availability of food than by temperature or salinity. It was found that the strategies of the species vary throughout the hydroperiod; at the beginning, thrives when the salinity rises and impedes the presence of less tolerant species. At this point, the production of relatively small eggs is high, allowing rapid colonization. When the lakes become relatively stable, B. poopoensis allocates more energy to reach larger sizes and although egg production is not so high, they are larger, allowing it to maintain stable populations.
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Maschio GF, Santos-Costa MC, Prudente AL. Road-Kills of Snakes in a Tropical Rainforest in the Central Amazon Basin, Brazil. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2016. [DOI: 10.2994/sajh-d-15-00026.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Nóbrega Alves RR, Pereira Filho GA, Silva Vieira K, Silva Souto WM, Mendonça LET, Montenegro P, Almeida WDO, Silva Vieira WL. A zoological catalogue of hunted reptiles in the semiarid region of Brazil. JOURNAL OF ETHNOBIOLOGY AND ETHNOMEDICINE 2012; 8:27. [PMID: 22846258 PMCID: PMC3480920 DOI: 10.1186/1746-4269-8-27] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Accepted: 07/18/2012] [Indexed: 05/15/2023]
Abstract
The variety of interactions between human cultures and herpetofauna is the subject matter of Ethnoherpetology, a subdivision of Ethnozoology. In the semi-arid region of Brazil, many reptiles interact with human communities because of their utility or because of the risks they represent. These interactions have obvious implications for the conservation of reptiles from this region. In this context, ethnoherpetology studies are crucial because they serve as subsidies for guiding strategies for the handling and conservation of reptiles. This paper presents ethnozoological and taxonomic informations of hunted reptiles in the semiarid region of Brazil and analyse the implications on conservation that are related to the interactions between people and reptiles in this region. Taxonomic keys to identifying recorded reptiles are provided. Records of humans interacting with 38 reptile species that belong to 31 genuses and 16 families have been found. The groups with the largest numbers of recorded species were snakes (18 species), and this group was followed in number by lizards (13), chelonians (4), and crocodilians (3). The reptiles that were recorded may be used for the following purposes: medicinal purposes (24 species), food (13 species), ornamental or decorative purposes (11 species), in magical/religious practices (10 species), and as pets (10 species). Some species (n = 16) may have multiple uses. Furthermore, more than half of the species (n = 19) are commonly killed because they are considered potentially dangerous. Strategies for conserving the reptiles of the Brazilian semi-arid region must reconcile and integrate human and conservation needs.
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Affiliation(s)
- Rômulo Romeu Nóbrega Alves
- Departamento de Biologia, Universidade Estadual da Paraíba, Av. das Baraúnas, 351/Campus Universitário, Bodocongó, 58109-753, Campina Grande-PB, Brazil
| | - Gentil Alves Pereira Filho
- Laboratório de Ecofisiologia Animal, Departamento de Sistemática e Ecologia da Universidade Federal da Paraíba, 58051-900, João Pessoa, PB, Brazil
| | - Kleber Silva Vieira
- Laboratório de Ecofisiologia Animal, Departamento de Sistemática e Ecologia da Universidade Federal da Paraíba, 58051-900, João Pessoa, PB, Brazil
| | - Wedson Medeiros Silva Souto
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Laboratório de Ecofisiologia Animal, Departamento de Sistemática e Ecologia da Universidade Federal da Paraíba, 58051-900, João Pessoa, PB, Brazil
| | - Lívia Emanuelle Tavares Mendonça
- Programa de Pós-Graduação em Ciências Biológicas (Zoologia), Laboratório de Ecofisiologia Animal, Departamento de Sistemática e Ecologia da Universidade Federal da Paraíba, 58051-900, João Pessoa, PB, Brazil
| | | | - Waltécio de Oliveira Almeida
- Departamento de Química Biológica, Bolsista Produtividade da Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico — FUNCAP, Universidade Regional do Cariri, Rua Cel. Antônio Luiz 1161, CEP, 63100-000, Crato, CE, Brazil
| | - Washington Luiz Silva Vieira
- Departamento de Química Biológica, Bolsista Produtividade da Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico — FUNCAP, Universidade Regional do Cariri, Rua Cel. Antônio Luiz 1161, CEP, 63100-000, Crato, CE, Brazil
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