scholarly journals Temporal variation of rotifer community in three climatic zones and their relationship with environmental factors

2021 ◽  
Vol 36 (1) ◽  
pp. 217-234
Author(s):  
Fang-Ping Qian ◽  
Xin-Li Wen ◽  
Yi-Long Xi
Keyword(s):  
Environmental Factors ◽  
Temporal Variation ◽  
Climatic Zones ◽  
Rotifer Community

scholarly journals Spatial and temporal variation in rotifer community structure and the response to environmental factors among different water bodies in Guangzhou City

2017 ◽  
Vol 29 (6) ◽  
pp. 1433-1443
Author(s):  
LIANG Diwen ◽  
◽  
WANG Qing ◽  
WEI Nan ◽  
Miloslav Devetter ◽  
...  
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Temporal Variation ◽  
Water Bodies ◽  
Spatial And Temporal Variation ◽  
Guangzhou City ◽  
Rotifer Community

scholarly journals Variations on the larval incubation of Anodontites trapesialis (Unionoida, Mycetopodidae): Synergetic effect of the environmental factors and host availability

2012 ◽  
Vol 72 (3) ◽  
pp. 545-552 ◽  
Author(s):  
CT. Callil ◽  
D. Krinski ◽  
FA. Silva
Keyword(s):  
Environmental Factors ◽  
Temporal Variation ◽  
Environmental Variables ◽  
Freshwater Mussels ◽  
Synergetic Effect ◽  
Flood Pulse ◽  
Host Availability

The unionid Anodontites trapesilais (Lamarck, 1819) like most freshwater mussels is a parasite of fish. So it is trivial to assume that the availability of hosts is an important factor for the maintenance of unionoid populations. What seems obvious is not always so easy to demonstrate. This study proposes to investigate the effects of abiotic and biotic variables related to the incubation of larvae in A. trapesialis. For this, we estimate different biological indexes and try to capture the dimensionality of the fish, along with the temporal variation of environmental variables. From the application of a CCA, it was demonstrated that there was a synchronicity among the factors and variables proposed here, and we infer that the flood pulse acts as a synergistic factor in this process.

scholarly journals Biological indicators of ecological quality in typical urban river-lake ecosystems: The planktonic rotifer community and its response to environmental factors

2020 ◽  
Vol 112 ◽  
pp. 106127 ◽  
Author(s):  
Diwen Liang ◽  
Qing Wang ◽  
Nan Wei ◽  
Changkuan Tang ◽  
Xian Sun ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Biological Indicators ◽  
Urban River ◽  
Ecological Quality ◽  
Lake Ecosystems ◽  
Rotifer Community

scholarly journals Temporal variation in the effects of individual and environmental factors on nest success

The Auk ◽  
2018 ◽  
Vol 135 (2) ◽  
pp. 326-341 ◽  
Author(s):  
Merle D. Crombie ◽  
Peter Arcese
Keyword(s):  
Environmental Factors ◽  
Temporal Variation ◽  
Nest Success

Influence of environmental factors on abundance and temporal variation of benthic fauna resources in the eutrophic Tha Chin estuary, Samut Sakhon province, Thailand

2011 ◽  
Vol 64 (6) ◽  
pp. 1261-1269
Author(s):  
Nittaya Ritnim ◽  
Charumas Meksumpun
Keyword(s):  
Environmental Factors ◽  
Temporal Variation ◽  
Negative Impact ◽  
Salinity Gradient ◽  
Sediment Quality ◽  
Benthic Fauna ◽  
Dry Weight ◽  
High Accumulation ◽  
Water And Sediment ◽  
The Status

The influence of environmental factors on the abundance and temporal variation of benthic fauna resources was studied in the eutrophic Tha Chin estuary located in Samut Sakhon province. The objectives were to analyze the status of abundance and temporal variation of the benthic fauna and to clarify the impacts from environmental factors (water and sediment quality). Field surveys were conducted monthly from August 2007 to March 2008 at 11 sampling stations in the estuary. Based on freshwater runoff volumes, the high-, medium-, and low-loading periods were categorized to be from August to October 2007, November to December 2007, and January to March 2008, respectively. The benthic fauna resources were composed of 57 species in eight phyla. Annelids were the dominant species (with the maximum density being 19,885 individuals/m2), followed by the mollusks. Both densities decreased during the low-loading period in 2008. Water quality deteriorated during the high-loading period. Land-based wastewater discharges decreased the levels of salinity and dissolved oxygen but dramatically increased various nutrients. Consequently, the sediment quality deteriorated during the medium-loading period. Bottom deposits during this time depicted high accumulation of acid volatile sulfides (more than 0.76 mg/g dry weight). Analyzing the environmental relationships, deposit feeders (for example, Nereis sp. and Prionospio sp.) and a clam (Arcuatula sp.) showed potential as bio-indicators for environmental monitoring. The overall results revealed the importance of changes in the water and sediment qualities that had an influence on related benthic resources. The increase in the level of NH4+-N had a negative impact on the economic clam species, while the sedimentary TOM showed positive correlation (P < 0.05) with this increase. The succession of groups based on feeding behavior seemed to correspond with stress in eutrophication along the salinity gradient and in different estuarine parts. In addition, the economic clam population decreased noticeably during the medium-loading period, as a consequence of deteriorated sediment conditions. Thus, the land-based runoff should be controlled for the protection of resources. Further effective sustainable management will be enhanced by giving serious consideration to an eco-based zoning scheme for conservation and restoration of the Tha Chin estuary.

scholarly journals Rotifer community structure and its response to environmental factors in the Backshore Wetland of Expo Garden, Shanghai

2018 ◽  
Vol 3 (2) ◽  
pp. 90-97 ◽  
Author(s):  
Liping Yin ◽  
Yu Ji ◽  
Yinjiang Zhang ◽  
Linxuan Chong ◽  
Lijing Chen
Keyword(s):  
Community Structure ◽  
Environmental Factors ◽  
Rotifer Community

Seasonal control of spatial distribution of soil moisture on a steep hillslope

2018 ◽  
Vol 79 (3) ◽  
pp. 556-565
Author(s):  
Xiaoyi Dong ◽  
Eunhyung Lee ◽  
Yongseok Gwak ◽  
Sanghyun Kim
Keyword(s):  
Soil Moisture ◽  
Environmental Factors ◽  
Temporal Variation ◽  
Principal Component Regression ◽  
Principal Component ◽  
Ecological Processes ◽  
Moisture Profile ◽  
Humid Forest ◽  
Control Factors ◽  
Spatio Temporal

Abstract Spatio-temporal variation in soil moisture plays an important role in hydrological and ecological processes. In the present study, we investigated the effect of environmental factors on variation in soil moisture at a hillslope scale. The relationships among various environmental factors, including soil properties, topographic indices, and vegetation of a humid forest hillslope, and soil moisture distributions were evaluated based on soil moisture data collected at 18 sampling locations over three seasons (spring, rainy, and autumn) at depths of 10, 30, and 60 cm. In order to evaluate the multi-dimensional data sets without the interaction among factors, the principal component regression (PCR) model was applied to identify the factors controlling the spatio-temporal variation in soil moisture. The effects on soil texture and topography were significant in spring. In addition, clay and sand appeared as critical control factors for the study area in all seasons. The transitional control patterns in the soil moisture profile indicated that the control varied depending on features, such as total amount, intensity, and duration, of rainfall events in spring and during the rainy season. The transitional control pattern for autumn showed that vegetation and local slope controlled transitions in topography.

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