scholarly journals Within-lake distribution patterns of fish assemblages: the relative roles of spatial, temporal and random environmental factors in assessing fish assemblages using gillnets in a large and shallow temperate lake

2013 ◽  
Vol 82 (3) ◽  
pp. 840-855 ◽  
Author(s):  
A. Specziár ◽  
Á. I. György ◽  
T. Erős
Keyword(s):  
Environmental Factors ◽  
Fish Assemblages ◽  
Distribution Patterns ◽  
Temperate Lake

scholarly journals Distribution Patterns of Odonate Assemblages in Relation to Environmental Variables in Streams of South Korea

Insects ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 152 ◽  
Author(s):  
Da-Yeong Lee ◽  
Dae-Seong Lee ◽  
Mi-Jung Bae ◽  
Soon-Jin Hwang ◽  
Seong-Yu Noh ◽  
...  
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Environmental Factors ◽  
South Korea ◽  
Habitat Heterogeneity ◽  
Environmental Variables ◽  
Environmental Changes ◽  
Distribution Patterns ◽  
Self Organizing Map ◽  
Factors Affecting

Odonata species are sensitive to environmental changes, particularly those caused by humans, and provide valuable ecosystem services as intermediate predators in food webs. We aimed: (i) to investigate the distribution patterns of Odonata in streams on a nationwide scale across South Korea; (ii) to evaluate the relationships between the distribution patterns of odonates and their environmental conditions; and (iii) to identify indicator species and the most significant environmental factors affecting their distributions. Samples were collected from 965 sampling sites in streams across South Korea. We also measured 34 environmental variables grouped into six categories: geography, meteorology, land use, substrate composition, hydrology, and physicochemistry. A total of 83 taxa belonging to 10 families of Odonata were recorded in the dataset. Among them, eight species displayed high abundances and incidences. Self-organizing map (SOM) classified sampling sites into seven clusters (A–G) which could be divided into two distinct groups (A–C and D–G) according to the similarities of their odonate assemblages. Clusters A–C were characterized by members of the suborder Anisoptera, whereas clusters D–G were characterized by the suborder Zygoptera. Non-metric multidimensional scaling (NMDS) identified forest (%), altitude, and cobble (%) in substrata as the most influential environmental factors determining odonate assemblage compositions. Our results emphasize the importance of habitat heterogeneity by demonstrating its effect on odonate assemblages.

Associations between fish assemblages and environmental factors for Mediterranean-type rivers during summer

2006 ◽  
Vol 69 (5) ◽  
pp. 1552-1569 ◽  
Author(s):  
R. Morán-López ◽  
E. Da Silva ◽  
J. L. Pérez-Bote ◽  
C. Corbacho Amado
Keyword(s):  
Environmental Factors ◽  
Fish Assemblages

Freshwater fishes of northern Australia

Zootaxa ◽  
2017 ◽  
Vol 4253 (1) ◽  
pp. 1 ◽  
Author(s):  
BRADLEY J. PUSEY ◽  
DAMIEN W. BURROWS ◽  
MARK J. KENNARD ◽  
COLTON N. PERNA ◽  
PETER J. UNMACK ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Conservation Planning ◽  
Information Sources ◽  
Fish Assemblages ◽  
Spatial Arrangement ◽  
Freshwater Fishes ◽  
Ecological Condition ◽  
Northern Australia ◽  
Field Surveys ◽  
Freshwater Habitats

Northern Australia is biologically diverse and of national and global conservation signicance. Its ancient landscape contains the world’s largest area of savannah ecosystem in good ecological condition and its rivers are largely free-flowing. Agriculture, previously confined largely to open range-land grazing, is set to expand in extent and to focus much more on irrigated cropping and horticulture. Demands on the water resources of the region are thus, inevitably increasing. Reliable information is required to guide and inform development and help plan for a sustainable future for the region which includes healthy rivers that contain diverse fish assemblages. Based on a range of information sources, including the outcomes of recent and extensive new field surveys, this study maps the distribution of the 111 freshwater fishes (excluding elasmobranches) and 42 estuarine vagrants recorded from freshwater habitats of the region. We classify the habitat use and migratory biology of each species. This study provides a comprehensive assessment of the diversity and distribution of fishes of the region within a standardised nomenclatural framework. In addition, we summarise the outcomes of recent phylogeographic and phylogenetic research using molecular technologies to identify where issues of taxonomy may need further scrutiny. The study provides an informed basis for further research on the spatial arrangement of biodiversity and its relationship to environmental factors (e.g. hydrology), conservation planning and phylogentic variation within individual taxa. 

Distribution patterns and environmental factors of zooplankton in the Qinzhou Bay in spring and autumn

2018 ◽  
Vol 38 (17) ◽  
Author(s):  
庞碧剑 PANG Bijian ◽  
李天深 LI Tianshen ◽  
蓝文陆 LAN Wenlu ◽  
黎明民 LI Mingmin ◽  
骆鑫 LUO Xin ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Distribution Patterns ◽  
Qinzhou Bay

Predicting the vertical distributions of reef fish larvae in the Straits of Florida from environmental factors

2010 ◽  
Vol 67 (11) ◽  
pp. 1755-1767 ◽  
Author(s):  
Klaus B. Huebert ◽  
Su Sponaugle ◽  
Robert K. Cowen
Keyword(s):  
Coral Reef ◽  
Environmental Factors ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Assemblages ◽  
Environmental Variability ◽  
Fish Larvae ◽  
Straits Of Florida ◽  
Diel Vertical Migrations ◽  
Vertical Distributions

Three seasons of vertically stratified ichthyoplankton sampling at the edge of the Florida Current revealed consistent accumulations of some coral reef fish larvae under taxon-specific environmental conditions. Environmental variability ranging from predictable (seasonal differences in temperature, diel changes in light, and vertical gradients in many variables) to stochastic (changes in wind-driven turbulence and patchiness of zooplankton) was used to model larval distributions. In five taxa, including the commercially important Epinephelini (groupers), relative larval densities were predicted with significant accuracy based entirely on sampling depth. Models yielding these predictions were cross-validated among all seasons, indicating that larval vertical distributions were remarkably unaffected by other environmental factors, while revealing strong behavioral preferences for specific ranges of hydrostatic pressure. Pomacentridae (damselfish) larvae consistently occupied shallower depths at night than during the day, demonstrating diel vertical migrations. At the community level, depth and season were two major factors structuring larval coral reef fish assemblages. Predictable vertical distributions of larvae in the Straits of Florida can facilitate modeling the same taxa elsewhere in the Western Central Atlantic.

Spatio-temporal distribution patterns and conservation of fish assemblages in a Chilean coastal river

2007 ◽  
Vol 16 (11) ◽  
pp. 3179-3191 ◽  
Author(s):  
Evelyn Habit ◽  
Mark Belk ◽  
Pedro Victoriano ◽  
Edilia Jaque
Keyword(s):  
Fish Assemblages ◽  
Temporal Distribution ◽  
Distribution Patterns ◽  
Spatio Temporal ◽  
Coastal River
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