scholarly journals Temporally dynamic habitat suitability predicts genetic relatedness among caribou

2014 ◽  
Vol 281 (1792) ◽  
pp. 20140502 ◽  
Author(s):  
Glenn Yannic ◽  
Loïc Pellissier ◽  
Maël Le Corre ◽  
Christian Dussault ◽  
Louis Bernatchez ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Habitat Use ◽  
Genetic Relatedness ◽  
Landscape Heterogeneity ◽  
Isolation By Distance ◽  
Temporal Variations ◽  
Genetic Connectivity ◽  
Landscape Permeability ◽  
Conservation Implications ◽  
Distance Model

Landscape heterogeneity plays a central role in shaping ecological and evolutionary processes. While species utilization of the landscape is usually viewed as constant within a year, the spatial distribution of individuals is likely to vary in time in relation to particular seasonal needs. Understanding temporal variation in landscape use and genetic connectivity has direct conservation implications. Here, we modelled the daily use of the landscape by caribou in Quebec and Labrador, Canada and tested its ability to explain the genetic relatedness among individuals. We assessed habitat selection using locations of collared individuals in migratory herds and static occurrences from sedentary groups. Connectivity models based on habitat use outperformed a baseline isolation-by-distance model in explaining genetic relatedness, suggesting that variations in landscape features such as snow, vegetation productivity and land use modulate connectivity among populations. Connectivity surfaces derived from habitat use were the best predictors of genetic relatedness. The relationship between connectivity surface and genetic relatedness varied in time and peaked during the rutting period. Landscape permeability in the period of mate searching is especially important to allow gene flow among populations. Our study highlights the importance of considering temporal variations in habitat selection for optimizing connectivity across heterogeneous landscape and counter habitat fragmentation.

Genetic Relationships of Cory's Shearwater: Parentage, Mating Assortment, and Geographic Differentiation Revealed by DNA Fingerprinting

The Auk ◽  
2000 ◽  
Vol 117 (3) ◽  
pp. 651-662 ◽  
Author(s):  
Corinne Rabouam ◽  
Vincent Bretagnolle ◽  
Yves Bigot ◽  
Georges Periquet
Keyword(s):  
Genetic Variation ◽  
Genetic Structure ◽  
Dna Fingerprinting ◽  
Genetic Relatedness ◽  
Isolation By Distance ◽  
Genetic Relationships ◽  
Cory’S Shearwater ◽  
Genetic Structure Of Populations ◽  
The Social ◽  
Calonectris Diomedea

Abstract We used DNA fingerprinting to assess genetic structure of populations in Cory's Shearwater (Calonectris diomedea). We analyzed mates and parent-offspring relationships, as well as the amount and distribution of genetic variation within and among populations, from the level of subcolony to subspecies. We found no evidence of extrapair fertilization, confirming that the genetic breeding system matches the social system that has been observed in the species. Mates were closely related, and the level of genetic relatedness within populations was within the range usually found in inbred populations. In contrast to previous studies based on allozymes and mtDNA polymorphism, DNA fingerprinting using microsatellites revealed consistent levels of genetic differentiation among populations. However, analyzing the two subspecies separately revealed that the pattern of genetic variation among populations did not support the model of isolation by distance. Natal dispersal, as well as historic and/or demographic events, probably contributed to shape the genetic structure of populations in the species.

The Habitat Use and Home Range Analysis of Dunlin (Calidris alpina) in Chongming Dongtan, China and their Conservation Implications

Wetlands ◽  
2013 ◽  
Vol 34 (2) ◽  
pp. 255-266 ◽  
Author(s):  
Chiyeung Choi ◽  
Xiaojing Gan ◽  
Ning Hua ◽  
Yong Wang ◽  
Zhijun Ma
Keyword(s):  
Home Range ◽  
Habitat Use ◽  
Range Analysis ◽  
Calidris Alpina ◽  
Conservation Implications ◽  
Home Range Analysis

scholarly journals Population Genetic Structure and Habitat Connectivity for Jaguar (Panthera onca) Conservation in Central Belize.

2019 ◽  
Author(s):  
Angelica Menchaca ◽  
Natalia Rossi ◽  
Jeremy Froidevaux ◽  
Isabela Dias-freedman ◽  
Anthony Caragiulo ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Gene Flow ◽  
Genetic Structure ◽  
Genetic Connectivity ◽  
Suitable Habitat ◽  
Fine Scale ◽  
Panthera Onca ◽  
Wildlife Sanctuary ◽  
Landscape Permeability ◽  
Forest Reserve

Abstract Connectivity among jaguar (Panthera onca) populations will ensure natural gene flow and the long-term survival of the species throughout its range. Jaguar conservation efforts have focused primarily on connecting suitable habitat in a broad-scale. Accelerated habitat reduction, human-wildlife conflict, limited funding, and the complexity of jaguar behaviour have proven challenging to maintain connectivity between populations effectively. Here, we used non-invasive genetic sampling and individual-based conservation genetic analyses to assess genetic diversity and levels of genetic connectivity between individuals in the Cockscomb Basin Wildlife Sanctuary and the Maya Forest Corridor. We used expert knowledge and scientific literature to develop models of landscape permeability based on circuit theory with fine-scale landscape features as ecosystem types, distance to human settlements and roads to predict the most probable jaguar movement across central Belize. Results We used 12 highly polymorphic microsatellite loci to identify 50 individual jaguars. We detected high levels of genetic diversity across loci (HE= 0.61, HO= 0.55, and NA=9.33). Using Bayesian clustering and multivariate models to assess gene flow and genetic structure, we identified one single group of jaguars (K = 1). We identified critical areas for jaguar movement that fall outside the boundaries of current protected areas in central Belize. We detected two main areas of high landscape permeability in a stretch of approximately 18 km between Sittee River Forest Reserve and Manatee Forest Reserve that may increase functional connectivity and facilitate jaguar dispersal from and to Cockscomb Basin Wildlife Sanctuary. Our analysis provides important insights on fine-scale genetic and landscape connectivity of jaguars in central Belize, an area of conservation concern. Conclusions The results of our study demonstrate high levels of relatively recent gene flow for jaguars between two study sites in central Belize. Our landscape analysis detected corridors of expected jaguar movement between the Cockscomb Basin Wildlife Sanctuary and the Maya Forest Corridor. We highlight the importance of maintaining already established corridors and consolidating new areas that further promote jaguar movement across suitable habitat beyond the boundaries of currently protected areas. Continued conservation efforts within identified corridors will further maintain and increase genetic connectivity in central Belize.

scholarly journals Assessing year‐round habitat use by migratory sea ducks in a multi‐species context reveals seasonal variation in habitat selection and partitioning

Ecography ◽  
2020 ◽  
Vol 43 (12) ◽  
pp. 1842-1858
Author(s):  
Juliet S. Lamb ◽  
Peter W. C. Paton ◽  
Jason E. Osenkowski ◽  
Shannon S. Badzinski ◽  
Alicia M. Berlin ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Habitat Selection ◽  
Habitat Use ◽  
Sea Ducks

Chloroplast DNA phylogeography in long-lived Huon pine, a Tasmanian rain forest conifer

2008 ◽  
Vol 38 (6) ◽  
pp. 1576-1589 ◽  
Author(s):  
Catherine M. Clark ◽  
Ignazio Carbone
Keyword(s):  
Nucleotide Diversity ◽  
Isolation By Distance ◽  
Population Bottlenecks ◽  
Base Pairs ◽  
Distance Model ◽  
History Of ◽  
Lagarostrobos Franklinii ◽  
Tasmanian Endemic ◽  
Western Portion

Genealogy based methods were used to estimate phylogeographic history for a Tasmanian endemic conifer, Huon pine ( Lagarostrobos franklinii (Hook. f.) Quinn). DNA from trees in eight populations was sequenced using three chloroplast primers (trnS–trnT, trnD–trnT, and psbC–trnS). Mean nucleotide diversity was low (π = 0.000 93 ± 0.000 06) from 892 base pairs of sequence, but varied in stands from 0.0 to 0.001 15. Two of the five haplotypes were widely distributed, but the most frequently occurring haplotype was found only in the western portion of the range. Population structure was highly significant among populations overall (GST = 0.261, where GST is the coefficient of gene differentiation, and p ≤ 0.0001), and there were indications of significant isolation by distance (p ≤ 0.022). Populations exhibited the highest levels of differentiation between the southeastern and northwestern watersheds. Estimates of migration between populations obtained using both parametric and nonparametric methods indicated levels of gene flow consistent with an isolation by distance model. Nested clade analysis demonstrated a pattern of genetic diversity in Huon pine that is consistent with a history of range expansion. The exceptionally low level of nucleotide diversity, haplotype distribution, and paleoecological data are congruent with a history of long-term range reduction, population bottlenecks, and subsequent colonization events from refugial areas.

Allozyme Evidence of Genetic Differentiation Between Populations of Hediste Diversicolor (Polychaeta: Nereididae) from the Western Mediterranean

1996 ◽  
Vol 76 (3) ◽  
pp. 637-647 ◽  
Author(s):  
M. Abbiati ◽  
F. Maltagliati
Keyword(s):  
Genetic Differentiation ◽  
Isolation By Distance ◽  
Western Mediterranean ◽  
Allozyme Electrophoresis ◽  
Isolated Populations ◽  
Hediste Diversicolor ◽  
Dispersal Capacity ◽  
Two Samples ◽  
Distance Model ◽  
Limited Dispersal

The occurrence of genetic differentiation among western Mediterranean Hediste diversicolor (Polychaeta: Nereididae) populations was assessed by allozyme electrophoresis on cellulose acetate. Seventeen loci were analysed in four populations. The level of the genetic variability was markedly low (mean HL range: 0.014–0.034), but comparable to that of other brackish water nereidids. The values of Nei genetic distance index (D) confirm the existence of genetic differentiation between the geographically isolated populations at Venice, Elba, Navicelli and Serchio D range: 0.128–0.356). However, the two samples from Serchio and Navicelli, ~15 km apart, were not genetically different (D=0·00005). The level of genetic differentiation in H. diversicolor populations followed the isolation-by-distance model. Reduced gene flow among H. diversicolor populations may be explained by its limited dispersal capacity and the eco-physiological barriers that occur between different brackish habitats.

Seasonal variation in coastal marine habitat use by the European shag: Insights from fine scale habitat selection modeling and diet

2017 ◽  
Vol 141 ◽  
pp. 224-236 ◽  
Author(s):  
Candice Michelot ◽  
David Pinaud ◽  
Matthieu Fortin ◽  
Philippe Maes ◽  
Benjamin Callard ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Habitat Selection ◽  
Habitat Use ◽  
Fine Scale ◽  
Marine Habitat ◽  
Coastal Marine

Isolation by distance in a hierarchically clustered population

1983 ◽  
Vol 20 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Stanley Sawyer ◽  
Joseph Felsenstein
Keyword(s):  
Total Population ◽  
Genetic Relatedness ◽  
Isolation By Distance ◽  
Random Mating ◽  
Physical Distance ◽  
Population Densities ◽  
Total Population Size ◽  
Biological Population ◽  
Equilibrium Probability ◽  
Different Levels

A biological population with local random mating, migration, and mutation is studied which exhibits clustering at several different levels. The migration is determined by the clustering rather than actual geographic or physical distance. Darwinian selection is assumed to be absent, and population densities are such that nearby individuals have a probability of being related. An expression is found for the equilibrium probability of genetic relatedness between any two individuals as a function of their clustering distance. Asymptotics for a small mutation rate u are discussed for both a finite number of clustering levels (and of total population size), and for an infinite number of levels. A natural example is discussed in which the probability of heterozygosity varies as u to a power times a periodic function of log(l/u).

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