Habitat Characteristics, Population Size, and Home Range of the Bog Turtle, Clemmys muhlenbergii, in Maryland

1989 ◽  
Vol 23 (4) ◽  
pp. 356 ◽  
Author(s):  
Janis Davis Chase ◽  
Kenneth R. Dixon ◽  
J. Edward Gates ◽  
Dan Jacobs ◽  
Gary J. Taylor
Keyword(s):  
Home Range ◽  
Population Size ◽  
Habitat Characteristics ◽  
Bog Turtle ◽  
Clemmys Muhlenbergii

Home Range and Movements of the Bog Turtle (Clemmys muhlenbergii) in Maryland

2001 ◽  
Vol 35 (1) ◽  
pp. 68 ◽  
Author(s):  
Jessica L. Morrow ◽  
James H. Howard ◽  
Scott A. Smith ◽  
Deborah K. Poppel
Keyword(s):  
Home Range ◽  
Bog Turtle ◽  
Clemmys Muhlenbergii

Population Size and Summer Home Range of the Green Crab, Carcinus maenas, in Salt Marsh Tidal Creeks

1999 ◽  
Vol 197 (2) ◽  
pp. 297-299 ◽  
Author(s):  
T. Young ◽  
S. Komarow ◽  
L. Deegan ◽  
R. Garritt
Keyword(s):  
Salt Marsh ◽  
Home Range ◽  
Population Size ◽  
Carcinus Maenas ◽  
Green Crab ◽  
Tidal Creeks

Population Size and Habitat Characteristics of the Indo-Pacific Humpback Dolphin (Sousa chinensis) Off Donsak, Surat Thani, Thailand

2015 ◽  
Vol 41 (2) ◽  
pp. 129-142 ◽  
Author(s):  
Suwat Jutapruet ◽  
Shiang-Lin Huang ◽  
Songhai Li ◽  
Mingli Lin ◽  
Kongkiat Kittiwattanawong ◽  
...  
Keyword(s):  
Population Size ◽  
Habitat Characteristics ◽  
Sousa Chinensis

Population Size and Home Range of American Eels in a Georgia Tidal Creek

1985 ◽  
Vol 114 (6) ◽  
pp. 821-825 ◽  
Author(s):  
Earl L. Bozeman ◽  
Gene S. Helfman ◽  
Thelma Richardson
Keyword(s):  
Home Range ◽  
Population Size ◽  
Tidal Creek ◽  
American Eels

scholarly journals Distribution, Population Size, and Habitat Characteristics of the Endangered European Ground Squirrel (Spermophilus citellus, Rodentia, Mammalia) in Its Southernmost Range

2021 ◽  
Vol 13 (15) ◽  
pp. 8411
Author(s):  
Dimitra-Lida Rammou ◽  
Dimitris Kavroudakis ◽  
Dionisios Youlatos
Keyword(s):  
Population Size ◽  
Ground Squirrel ◽  
Agricultural Land ◽  
Land Use Changes ◽  
Population Decline ◽  
Habitat Characteristics ◽  
System Productivity ◽  
Agroecological Zones ◽  
Conservation Actions ◽  
Spermophilus Citellus

The European ground squirrel (Spermophilus citellus) is an endangered species, endemic to Central and Southeastern Europe, inhabiting burrow colonies in grassland and agricultural ecosystems. In recent years, agricultural land-use changes and increased urbanization have largely contributed to a severe population decline across its range, particularly in its southernmost edge. Assessing the population and habitat status of this species is essential for prioritizing appropriate conservation actions. The present study aims to track population size changes and identify habitat characteristics of the species in Greece via a literature search, questionnaires, and fieldwork for assessing trends in population size as well as spatial K-means analysis for estimating its relation to specific habitat attributes. We found that both distribution size (grid number) and colony numbers of the species decreased in the last decades (by 62.4% and 74.6%, respectively). The remaining colonies are isolated and characterized by low density (mean = 7.4 ± 8.6 ind/ha) and low number of animals (mean = 13 ± 16 individuals). Most of the colonies are situated in lowlands and did not relate to specific habitat attributes. Habitat aspect and system productivity (NDVI) were the main factors contributing mostly to the clustering of the existing colonies. These results demonstrate that the species is confined to small, isolated anthropogenic habitats. Specific conservation actions such as population reinforcement, habitat improvement, and specific common agricultural policy measures could effectively improve agroecological zones that are suitable for the maintenance and protection of existing and potential habitats for populations of the species.

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