scholarly journals Observations on an Isolated Population of Sagitta hispida Conant (Chaetognatha) in a Tropical Lagoon System of Northeast Yucatan (Mexico)

1996 ◽  
Vol 9 ◽  
Author(s):  
Jose N. Alvarez-Cadena ◽  
Eduardo Suarez-Morales ◽  
Jerry A. McLelland
Keyword(s):  
Isolated Population ◽  
Lagoon System ◽  
Tropical Lagoon

First signs of changes to a tropical lagoon system in the southeastern Brazilian coastline

2012 ◽  
Vol 17 (1) ◽  
pp. 11-23 ◽  
Author(s):  
C. L. T. Mendes ◽  
A. Soares-Gomes
Keyword(s):  
Lagoon System ◽  
Tropical Lagoon

scholarly journals Triazines in the tropical lagoon system of Mundaú-Manguaba, NE-Brazil

2010 ◽  
Vol 21 (6) ◽  
pp. 1096-1105 ◽  
Author(s):  
Débora A. Azevedo ◽  
Thaís R. Silva ◽  
Bastiaan A. Knoppers ◽  
Detlef Schulz-Bull
Keyword(s):  
Lagoon System ◽  
Tropical Lagoon

High prevalence of diabetes in young Pima Indians: evidence of phenotypic variation in a genetically isolated population

Diabetes ◽  
1979 ◽  
Vol 28 (10) ◽  
pp. 937-942 ◽  
Author(s):  
P. J. Savage ◽  
P. H. Bennett ◽  
R. G. Senter ◽  
M. Miller
Keyword(s):  
Phenotypic Variation ◽  
Isolated Population ◽  
Pima Indians ◽  
High Prevalence

THÀNH PHẦN LOÀI VÀ ĐẶC ĐIỂM PHÂN BỐ CỦA ĐỘNG VẬT HAI MẢNH VỎ (BIVALVIA) Ở HỆ ĐẦM PHÁ TAM GIANG - CẦU HAI

2016 ◽  
Vol 119 (5) ◽  
Author(s):  
Võ Văn Phú
Keyword(s):  
New Species ◽  
Species Composition ◽  
Southeast Asia ◽  
Distribution Characteristics ◽  
Lagoon System ◽  
Ecology And Environment

TÓM TẮT Đầm phá Tam Giang - Cầu Hai thuộc vào hệ đầm phá lớn nhất Đông Nam Á với diện tích 22.000 ha, đặc trưng cho vùng nhiệt đới gió mùa. Hệ đầm phá là vùng có giá trị về đa dạng sinh học, sinh thái và môi trường. Từ 08/2014 đến 07/2015 chúng tôi đã tiến hành thu thập vật mẫu, nghiên cứu và đã xác định được 24 loài động vật hai mảnh vỏ thuộc 19 giống, 11 họ, 7 bộ. Bổ sung thêm 6 loài thuộc 6 giống, 5 họ mới so với nghiên cứu trước đây. Đánh giá được đặc điểm phân bố về thành phần loài, mật độ cá thể động vật hai mảnh vỏ theo ba loại nền đáy (cát bùn, bùn cát và giá thể) và ba nhóm loài theo độ mặn (loài nước ngot, nước lợ và nước mặn). Abstract Tam Giang - Cau Hai lagoon is the largest in Southeast Asia. It is ​​22,000 hectares. Lagoon system is high of biodiversity, ecology and environment. According to a researcher from August 2014 to July 2015, we have identified 24 species of 19 genera of 11 families of 7 orders of bivalve (Bivalvia) to be living in Tam Giang - Cau Hai lagoon. The result added 6 new species of 6 genera of 5 orders compared with previous studies. We have appreciated distribution characteristics of species composition, density of individual animals bivalve in three categories substrata (silt, sand and substrate ) and three groups of species under salinity (species of freshwater, brackish and saltwater).

The First Record of Tesselated Snake, Natrix tesselata Laurenti, 1768 in the Central Chernozem Territory of Russia and Some Other Results of the Herpetological Research in the Upper Don

2011 ◽  
Vol 4 (2) ◽  
pp. 192-194
Author(s):  
Georgy A. Lada ◽  
V. Y. Nedosekin
Keyword(s):  
Rana Temporaria ◽  
First Record ◽  
Isolated Population ◽  
Common Frog ◽  
Northern Border ◽  
Frog Rana Temporaria ◽  
Bombina Bombina ◽  
Central Chernozem

A small isolated population of tesselated snake, Natrix tesselata was found in the Upper Don (Lipetsk Region, Russia). It is the first record of this species in the Central Chernozem Territory of Russia, which is separated from the northern border of the main range by the distance of about 200 km. An isolated population of common frog, Rana temporaria and phenetically peculiar population of fire-bellied toad, Bombina bombina are found here too. Faunistic aspect of new herpetological records is discussed.

MERCURY TOXICITY AND TRANSPORTATION IN A WILDFIRE AFFECTED WATERSHED AND LAGOON SYSTEM

2020 ◽  
Author(s):  
Erin E. Schmitt ◽  
◽  
Byran C. Fuhrmann ◽  
Christian L. Hoover ◽  
Joshua W. Cottingham ◽  
...  
Keyword(s):  
Mercury Toxicity ◽  
Lagoon System

Population fragmentation causes inadequate gene flow and increases extinction risk

2017 ◽  
Author(s):  
Richard Frankham ◽  
Jonathan D. Ballou ◽  
Katherine Ralls ◽  
Mark D. B. Eldridge ◽  
Michele R. Dudash ◽  
...  
Keyword(s):  
Gene Flow ◽  
Extinction Risk ◽  
Random Mating ◽  
Large Population ◽  
Isolated Population ◽  
Population Fragmentation ◽  
Single Population ◽  
Total Size ◽  
Limited Gene Flow

Most species now have fragmented distributions, often with adverse genetic consequences. The genetic impacts of population fragmentation depend critically upon gene flow among fragments and their effective sizes. Fragmentation with cessation of gene flow is highly harmful in the long term, leading to greater inbreeding, increased loss of genetic diversity, decreased likelihood of evolutionary adaptation and elevated extinction risk, when compared to a single population of the same total size. The consequences of fragmentation with limited gene flow typically lie between those for a large population with random mating and isolated population fragments with no gene flow.

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