Climatic changes can drive the loss of genetic diversity in a Neotropical savanna tree species

There were diverse causes and demographic and evolutionary consequences of migration of the Unangan (a.k.a. Aleut) people in their expansion from Siberia through the Aleutian archipelago. The causes included subsistence patterns, volcanic eruptions that destroyed island econiches, climatic changes that calmed the seas and made interisland migrations possible, and cultural contacts as well as forcible relocations. The consequences of the migrations included an intimate relationship between genetics, as revealed by mitochondrial DNA, and geography; loss of genetic diversity due to population fission along kin groups; creation of genetic barriers due to periodic climatic limitations to migrations; population genetic differentiation due to kin migration and founder effect; and admixture with Russian administrators and military in the western and central islands and with fishermen of English and Scandinavian ancestry in the eastern islands.

Download Full-text

Every beach an island—deep population divergence and possible loss of genetic diversity in Tylos granulatus, a sandy shore isopod

Marine Ecology Progress Series ◽

10.3354/meps12882 ◽

2019 ◽

Vol 614 ◽

pp. 111-123 ◽

Cited By ~ 1

Author(s):

NA Mbongwa ◽

C Hui ◽

A Pulfrich ◽

S von der Heyden

Keyword(s):

Genetic Diversity ◽

Population Divergence ◽

Sandy Shore ◽

Loss Of Genetic Diversity

Download Full-text

Aire et gestion des ressources en chêne du canton de Vaud: dossier d'un avenir immédiat | Resource management and distribution area of oak in canton Vaud: an issue for the immediate future

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.2009.s0065 ◽

2009 ◽

Vol 160 (s1) ◽

pp. s65-s73

Author(s):

Denis Horisberger ◽

Micheline Meylan

Keyword(s):

Resource Management ◽

Tree Species ◽

Climatic Changes ◽

Distribution Area ◽

Oak Forests ◽

Genetic Inheritance ◽

Main Species ◽

Forestry Management ◽

New Situation

When climatic changes are taken into account in forestry management, the question arises of the choice of tree species in order to adapt the forests to increased temperatures and stress arising from lack of water. The oak could be the main species accommodating itself to the new situation up to an altitude of about 900 m. A maximal development of this genetic inheritance adapted to our soils and the reinstallation of a network of oak forests would in fact give a new boost to the exceptional biodiversity linked to this species. In canton Vaud, the application of a sylviculture favourable to the oak would concern a relatively small and reasonable area of approximately 8,000 hectares, which corresponds to less than 20% of the surface theoretically adapted to this species, with a rhythm of rejuvenation of about 40 hectares a year.

Download Full-text

Genetic diversity of central and peripheral populations of Toona ciliata var. pubescens, an endangered tree species endemic to China

Chinese Journal of Plant Ecology ◽

10.3724/sp.j.1258.2013.00006 ◽

2013 ◽

Vol 37 (1) ◽

pp. 52-60 ◽

Cited By ~ 2

Author(s):

Jun LIU ◽

Jing-Min JIANG ◽

Jun ZOU ◽

Jin-Liang XU ◽

Han SHEN ◽

...

Keyword(s):

Genetic Diversity ◽

Tree Species ◽

Peripheral Populations ◽

Endangered Tree ◽

Endangered Tree Species ◽

Toona Ciliata

Download Full-text

Evolutionary genetics of small populations

10.1093/oso/9780198783398.003.0002 ◽

2017 ◽

Author(s):

Richard Frankham ◽

Jonathan D. Ballou ◽

Katherine Ralls ◽

Mark D. B. Eldridge ◽

Michele R. Dudash ◽

...

Keyword(s):

Genetic Diversity ◽

Population Size ◽

Evolutionary Genetics ◽

Small Population ◽

Small Populations ◽

Effective Population ◽

Genetic Management ◽

Evolutionary Genetic ◽

Loss Of Genetic Diversity ◽

Number Of Individuals

Genetic management of fragmented populations involves the application of evolutionary genetic theory and knowledge to alleviate problems due to inbreeding and loss of genetic diversity in small population fragments. Populations evolve through the effects of mutation, natural selection, chance (genetic drift) and gene flow (migration). Large outbreeding, sexually reproducing populations typically contain substantial genetic diversity, while small populations typically contain reduced levels. Genetic impacts of small population size on inbreeding, loss of genetic diversity and population differentiation are determined by the genetically effective population size, which is usually much smaller than the number of individuals.

Download Full-text