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  • Wiley  (5)
  • 2015-2019  (5)
  • 1
    Online Resource
    Online Resource
    Effects of Aquaculture on Lakes in the Central Yangtze River Basin, China, II : Benthic Macroinvertebrates
    Wiley ; 2018
    In:  North American Journal of Aquaculture Vol. 80, No. 4 ( 2018-10), p. 369-378
    Details
    In: North American Journal of Aquaculture, Wiley, Vol. 80, No. 4 ( 2018-10), p. 369-378
    Abstract: There is limited information available on the effects of extensive aquaculture or “fish ranching” operations on lake ecosystems. To study the effects of aquaculture on lake ecosystems, benthic macroinvertebrate communities were investigated from July to September 2015 in 23 lakes within the middle reach of the Yangtze River basin. The lakes represented four lake management strategies: fish ranching supported by low ( LOW ), medium ( MEDIUM ), or high ( HIGH ) stocking rates; or fallowing ( FALLOW ) in which previously ranched HIGH lakes had not been stocked for 2 years. Total macroinvertebrate densities did not vary significantly but were highest in the FALLOW lakes (2,352 individuals/m 2 ), lowest in the LOW lakes (544 individuals/m 2 ), and intermediate in the HIGH (1,734 individuals/m 2 ) and MEDIUM lakes (1,208 individuals/m 2 ). Chironomid densities were significantly lower in LOW lakes compared to all others, and mollusks were not observed in LOW lakes. Chironomid and total macroinvertebrate biomasses were also significantly lower in LOW lakes than in the other lakes. The FALLOW lakes had significantly greater biomasses of mollusks, oligochaetes, and total macroinvertebrates than all other lakes. Two pollution‐tolerant taxa, Tubificidae and Chironomidae, were dominant in all lakes regardless of management strategy, indicating that all study lakes were experiencing some degree of eutrophication. Results indicated that fish ranching does not affect macroinvertebrate communities in a predictable manner based on stocking density, but allowing for a fallowing period could potentially benefit lake macroinvertebrates. Canonical correspondence analysis indicated that chlorophyll a , chloride, conductivity, and total nitrogen were affecting macroinvertebrate density in these lakes, while total suspended solids, alkalinity, turbidity, total hardness, and water depth affected macroinvertebrate biomass.
    Type of Medium: Online Resource
    ISSN: 1522-2055 , 1548-8454
    URL: Issue
    URL: Article
    DOI: 10.1002/naaq.2018.80.issue-4
    DOI: 10.1002/naaq.10041
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2192450-8
    detail.hit.zdb_id: 1482260-X
    SSG: 21,3
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    Different roles of elevational and local environmental factors on abundance‐based beta diversity of the soil Enchytraeidae on the Changbai Mountain
    Wiley ; 2019
    In:  Ecology and Evolution Vol. 9, No. 4 ( 2019-02), p. 2180-2188
    Details
    In: Ecology and Evolution, Wiley, Vol. 9, No. 4 ( 2019-02), p. 2180-2188
    Abstract: The elevational alpha biodiversity gradient in mountain regions is one of the well‐known ecological patterns, but its beta diversity pattern remains poorly known. Examining the beta diversity and its components could enhance the understanding of community assembly mechanism. We studied the beta diversity pattern of the soil enchytraeids along a distinct elevational gradient (705–2,280 m) on the Changbai Mountain, the best‐preserved mountain in northeastern China. The overall abundance‐based community dissimilarity was relatively high (ca. 0.70), largely due to the balanced‐variation component (85%). The overall dissimilarity and its balanced‐variation (substitution) component were related to both local environmental heterogeneity and elevational distance, with the environmental relationships being stronger. In contrast, the abundance‐gradient (subsets) component was not related to the two gradients. The same important spatial and environmental variables were detected in structuring overall dissimilarity and substitution component, different from that in subsets component. Variation partitioning analysis showed that environmental control played a more important role than spatial (vertical and horizontal) factors in structuring the patterns of overall beta diversity and its two components. The predictive power of multivariate analysis was higher for the substitution component (nearly 50%) and overall dissimilarity (35%), but much lower for subsets components ( 〈 4%). These findings implied that abundance‐based beta diversity patterns of the soil enchytraeids were the results of different ecological processes (e.g., environmental sorting and dispersal limitation), operating in the two antithetic components. Our study showed the substitution and loss of individuals reflecting different ecological processes and highlights the importance of partitioning beta diversity in assessing biodiversity patterns and their causes.
    Type of Medium: Online Resource
    ISSN: 2045-7758 , 2045-7758
    URL: Issue
    URL: Article
    DOI: 10.1002/ece3.2019.9.issue-4
    DOI: 10.1002/ece3.4913
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2635675-2
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  • 3
    Online Resource
    Online Resource
    Control of Cyanobacterial Blooms via Synergistic Effects of Pulmonates and Submerged Plants
    Wiley ; 2015
    In:  CLEAN – Soil, Air, Water Vol. 43, No. 3 ( 2015-03), p. 330-335
    Details
    In: CLEAN – Soil, Air, Water, Wiley, Vol. 43, No. 3 ( 2015-03), p. 330-335
    Abstract: Control of cyanobacterial blooms remains a major challenge in the restoration and management of eutrophic waters. In this study, a synergistic approach of snails and submerged plants was used for controlling cyanobacterial blooms in a series of simulated experiments. Individual and/or combined effects of a pulmonate ( Radix swinhoei ) and a submerged plant ( Potamogeton lucens ) on cyanobacterial blooms were determined. The effect of R. swinhoei on the cyanobacterial decrements was not obvious but inversely increased nutrient concentration. However, aquatic plants had certain effects reflected by decreased concentrations in chlorophyll a, total nitrogen, total phosphorus and the potassium permanganate index to 31.5, 17.9, 48.6 and 21.1%, respectively, after a ten days experimental period. Furthermore, when snails and plants were combined, these ratios disproportionately reached 76.2, 51.4, 55.6 and 31.6%, respectively. Results confirmed that use of a combination of snails and submerged plants to eliminate cyanobacterial bloom in eutrophic waters may be a helpful tool in eutrophication control.
    Type of Medium: Online Resource
    ISSN: 1863-0650 , 1863-0669
    URL: Issue
    URL: Article
    DOI: 10.1002/clen.v43.3
    DOI: 10.1002/clen.201300922
    Language: English
    Publisher: Wiley
    Publication Date: 2015
    detail.hit.zdb_id: 2270984-8
    detail.hit.zdb_id: 2271097-8
    SSG: 13
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Seventy‐five years of biodiversity decline of fish assemblages in Chinese isolated plateau lakes: widespread introductions and extirpations of narrow endemics lead to regional loss of dissimilarity
    Wiley ; 2017
    In:  Diversity and Distributions Vol. 23, No. 2 ( 2017-02), p. 171-184
    Details
    In: Diversity and Distributions, Wiley, Vol. 23, No. 2 ( 2017-02), p. 171-184
    Abstract: Introductions of exotic species have globally modified the structure and function of native assemblages and are recognized as one of the major threats to biodiversity. The current patterns, processes and consequences of invasion have been intensively studied globally, but studies reporting the long‐term dynamics of invasions over large areas are rare. Here, we measured how the temporal changes in fish assemblage composition in a Chinese highland isolated‐lake landscape drive taxonomic dissimilarity and its turnover component over three successive time periods spanning the last 75 years. Location Yun–Gui Plateau, 15 isolated lakes. Methods The Sørensen and Simpson indices were used to quantify changes in taxonomic dissimilarity and its turnover component over 1940–2015. Results We report a decline of taxonomic dissimilarity between lakes through time, mainly due to a decrease in species turnover. Such a homogenization process was due to the combined effects of the invasion of the same non‐native species in most lakes and of extirpation of narrow endemic species. The strong decline in species dissimilarity and turnover was triggered by a high historical level of dissimilarity among assemblages. At a regional scale, the combined effect of introductions and extirpations modified the distance decay of taxonomic similarity between lakes. Surprisingly, this beta‐diversity gradient is currently no longer supported by biogeographic and evolutionary processes, but by the human‐mediated introduction of distinct exotic species in some lakes. Moreover, an extinction debt process was evident as extirpations sometimes occurred many years after the introduction of non‐native species. Main conclusions Our study highlights that high historical differentiation of fishes in isolated lakes has turned to homogenization with dramatic loss of endemic species due to intensive introductions. This provides a striking example of human domination over an extended lake landscape and its associated irreparable biodiversity damages on isolated systems historically dominated by narrow endemic species.
    Type of Medium: Online Resource
    ISSN: 1366-9516 , 1472-4642
    URL: Issue
    URL: Article
    DOI: 10.1111/ddi.2017.23.issue-2
    DOI: 10.1111/ddi.12507
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 2020139-4
    detail.hit.zdb_id: 1443181-6
    SSG: 12
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    Online Resource
  • 5
    Online Resource
    Online Resource
    Multiple facets of stream macroinvertebrate alpha diversity are driven by different ecological factors across an extensive altitudinal gradient
    Wiley ; 2019
    In:  Ecology and Evolution Vol. 9, No. 3 ( 2019-02), p. 1306-1322
    Details
    In: Ecology and Evolution, Wiley, Vol. 9, No. 3 ( 2019-02), p. 1306-1322
    Abstract: Environmental filtering and spatial structuring are important ecological processes for the generation and maintenance of biodiversity. However, the relative importance of these ecological drivers for multiple facets of diversity is still poorly understood in highland streams. Here, we examined the responses of three facets of stream macroinvertebrate alpha diversity to local environmental, landscape‐climate and spatial factors in a near‐pristine highland riverine ecosystem. Taxonomic (species richness, Shannon diversity, and evenness), functional (functional richness, evenness, divergence, and Rao's Quadratic entropy), and a proxy of phylogenetic alpha diversity (taxonomic distinctness and variation in taxonomic distinctness) were calculated for macroinvertebrate assemblages in 55 stream sites. Then Pearson correlation coefficient was used to explore congruence of indices within and across the three diversity facets. Finally, multiple linear regression models and variation partitioning were employed to identify the relative importance of different ecological drivers of biodiversity. We found most correlations between the diversity indices within the same facet, and between functional richness and species richness were relatively strong. The two phylogenetic diversity indices were quite independent from taxonomic diversity but correlated with functional diversity indices to some extent. Taxonomic and functional diversity were more strongly determined by environmental variables, while phylogenetic diversity was better explained by spatial factors. In terms of environmental variables, habitat‐scale variables describing habitat complexity and water physical features played the primary role in determining the diversity patterns of all three facets, whereas landscape factors appeared less influential. Our findings indicated that both environmental and spatial factors are important ecological drivers for biodiversity patterns of macroinvertebrates in Tibetan streams, although their relative importance was contingent on different facets of diversity. Such findings verified the complementary roles of taxonomic, functional and phylogenetic diversity, and highlighted the importance of comprehensively considering multiple ecological drivers for different facets of diversity in biodiversity assessment.
    Type of Medium: Online Resource
    ISSN: 2045-7758 , 2045-7758
    URL: Issue
    URL: Article
    DOI: 10.1002/ece3.2019.9.issue-3
    DOI: 10.1002/ece3.4841
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2635675-2
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