Conservation Genetics

Journal: Conservation Genetics

Abbreviation

Conserv Genet

Publisher

Springer

ISSN

1572-9737
1566-0621

Show all metadata

Search Results

Publications 1 - 10 of 17

Clonal distribution and spatial genetic structure of the reef-building coral Galaxea fascicularis
Nakajima, Yuichi; Wepfer, Patricia H.; Mitarai, Satoshi (2024)
Conservation Genetics
Genotypic distributions affect the persistence of coral populations, and mapping these distributions is important for population management. Many studies have examined genetic connectivity among sites, but within-site spatial genotypic patterns based on clonal distribution and kinship are poorly understood. Such patterns are an important index for understanding the potential for population recovery at small spatial scales. Here, we studied within-reef spatial genotypic distributions and clonality of a broadcast-spawning coral, Galaxea fascicularis, by using mitochondrial DNA (mtDNA) and 15 nuclear microsatellite markers. Specimens were collected at shallow reefs (< 3 m) at four sites in the Ryukyu Archipelago, Japan. Among 289 colonies analyzed, we detected two common mtDNA types (mt-L, 174 colonies; mt-S, 113 colonies) and one rare type (mt-L + , 2 colonies). The proportion of duplicate clonal colonies differed across sites and reef topographies; the maximum distance between clonemates was approximately 120 m. Pairwise kinship among colonies tended to decrease with distance at the ramet level (i.e., including clonal replicates), but not at the genet level. Ramet-level kinship varied among sites rather than between mtDNA types. Genet-level kinship (i.e., excluding clonal replicates) was similar among sites. These results for clonality and kinship suggest that both sexual and asexual reproduction contribute to population recovery after disturbances and maintain genetic diversity in local populations. However, the extent of sexual and asexual reproduction differs across sites. Our results will contribute to more effective management of marine reserves by emphasizing the importance of clonal distributions and genetic kinship at each reef site.
Low RAPD variation and female-biased sex ratio indicate genetic drift in small populations of the dioecious conifer Taxus baccata in Switzerland
Hilfiker, Karin; Gugerli, Felix; Schütz, Jean-Philippe; et al. (2004)
Conservation Genetics
Fragmentation Genetics of Vateria indica: implications for management of forest genetic resources of an endemic dipterocarp
Ismail, Sascha A.; Ghazoul, Jaboury; Ravikanth, Gudasalamani; et al. (2014)
Conservation Genetics
Tropical agro-forest landscapes are potentially valuable reserves of forest genetic resources for forestry and restoration of degraded forests. The Dipterocarpaceae is a dominant Southeast Asian family of tree species of global significance for the tropical timber industry. Very little information exists about how effective human modified landscapes are for conserving genetic diversity in dipterocarp species. This study provides a baseline for understanding how fragmented agro-forest landscapes in India sustain forest genetic resources in an endemic dipterocarp tree. We compare genetic diversity and fine-scale spatial genetic structure (FSGS) in the threatened tree species Vateria indica within an isolated and a continuous forest site in the Western Ghats, South India. We place these results in the context of dipterocarps from both the Seychelles and Borneo. Parentage analysis of 694 progeny using twelve nuclear microsatellite markers is applied to estimate pollen and seed dispersal. Using a nursery trial we evaluate effects of inbreeding on growth performance. Our results show that levels of FSGS, and gene dispersal are comparable between a small isolated and a large continuous site of V. indica. Realized long-distance pollen flow into the isolated patch appears to help maintaining genetic diversity. The nursery experiment suggests that selection favours outbred progeny. Individuals of V. indica in close proximity appear less related to each other than in another highly fragmented and endangered dipterocarp species from the Seychelles, but more related than in three dipterocarp species studied in continuous forest in Borneo. We discuss the wider implications of our findings in the context of conservation and restoration of dipterocarp forest genetic resources in fragmented populations.
Developing a monitoring program of genetic diversity: what do stakeholders say?
Pärli, Rea; Lieberherr, Eva; Holderegger, Rolf; et al. (2021)
Conservation Genetics
Genetic diversity is a fundamental component of biological diversity, and its conservation is considered key to ensure the long-term survival of natural populations and species. National and international legislation increasingly mandates a monitoring of genetic diversity. Examples are the United Nation's Convention on Biological Diversity (CBD) Aichi target 13 and the current post-2020 negotiations to specify a new target for maintaining genetic diversity. To date, only a few pilot projects have been launched that systematically monitor genetic diversity over time in natural populations of a broad variety of wild species. The Swiss Federal Office for the Environment mandated a feasibility study in 2019 for implementing a national monitoring of genetic diversity in natural populations. To obtain information on whether stakeholders are interested in such a systematic monitoring, what they would expect from such a monitoring and where they see respective caveats, we conducted an online survey, which 138 (42% of those surveyed) Swiss stakeholders answered. We find that Swiss stakeholders are generally aware of the lacking evidence regarding the status of genetic diversity in wild populations and species. Accordingly, most stakeholders are interested in a monitoring of genetic diversity and see opportunities for the application of its results in their work. Nevertheless, stakeholders also expressed concerns regarding financial resources and that the results of a genetic diversity monitoring program would not benefit conservation practice. Our findings highlight the importance of stakeholder engagement and demonstrate the value of a detailed stakeholder analysis prior to developing and implementing a genetic diversity monitoring program. A powerful tool for examining the constellation and interactions of the different stakeholders are social network analyses (SNAs). Finally, it is particularly important to communicate transparently about the possibilities and limitations of a genetic diversity monitoring program as well as to closely involve stakeholders from the beginning to increase the acceptance of genetic diversity monitoring and facilitate its implementation.
Low genetic variation reduces cross-compatibility and offspring fitness in populations of a narrow endemic plant with a self-incompatibility system
Fischer, Markus; Hock, Miguel; Paschke, Melanie (2003)
Conservation Genetics
Relations between population size, allozyme variation, and plant performance in the narrow endemic Cochlearia bavarica
Paschke, Melanie; Abs, Clemens; Schmid, Bernhard (2002)
Conservation Genetics
Genetic variation and plant performance in fragmented populations of globeflowers (Trollius europaeus) within agricultural landscapes
Klank, Charlotte; Ghazoul, Jaboury; Pluess, Andrea R. (2012)
Conservation Genetics
How to make landscape genetics beneficial for conservation management?
Keller, Daniela; Holderegger, Rolf; van Strien, Maarten J.; et al. (2015)
Conservation Genetics
Unprecedented long-term genetic monomorphism in an endangered relict butterfly species
Habel, Jan C.; Zachos, Frank E.; Finger, Aline; et al. (2009)
Conservation Genetics
Identifying genetic signatures of selection in a non-model species, alpine gentian (Gentiana nivalis L.), using a landscape genetic approach
Bothwell, Helen; Bisbing, Sarah; Therkildsen, Nina Overgaard; et al. (2013)
Conservation Genetics

Publications 1 - 10 of 17

Journal: Conservation Genetics

Abbreviation

Publisher

Journal Volumes

ISSN

Description

Filters

Search Results