scholarly journals Is there a positive relationship between naturalness and genetic diversity in forest tree communities?

2009 ◽  
Vol 18 (1) ◽  
pp. 20 ◽  
Author(s):  
C. Wehenkel ◽  
J. J. Corral-Rivas ◽  
H. A. Castellanos-Bocaz ◽  
A. Pinedo-Alvarez
Keyword(s):  
Genetic Diversity ◽  
Positive Relationship ◽  
Forest Tree ◽  
Tree Communities

Is there a trade-off between species diversity and genetic diversity in forest tree communities?

Plant Ecology ◽  
2006 ◽  
Vol 185 (1) ◽  
pp. 151-161 ◽  
Author(s):  
Christian Wehenkel ◽  
Fritz Bergmann ◽  
Hans-Rolf Gregorius
Keyword(s):  
Genetic Diversity ◽  
Species Diversity ◽  
Forest Tree ◽  
Trade Off ◽  
Tree Communities

scholarly journals Genotype-Species Interactions in Neighbourhoods of Forest Tree Communities

2007 ◽  
Vol 56 (1-6) ◽  
pp. 101-110 ◽  
Author(s):  
Chr. Wehenkel ◽  
F. Bergmann ◽  
H.-R. Gregorius
Keyword(s):  
Species Interactions ◽  
Species Coexistence ◽  
Biotic Interactions ◽  
Forest Tree ◽  
Target Species ◽  
Species Identity ◽  
Enzymatic Function ◽  
Genotype Frequencies ◽  
Tree Communities ◽  
Large Survey

Abstract Studies on plant communities of various annual species suggest that there are particular biotic interactions among individuals from different species which could be the basis for long-term species coexistence. In the course of a large survey on species-genetic diversity relationships in several forest tree communities, it was found that statistically significant differences exist among isozyme genotype frequencies of conspecific tree groups, which differ only by species identity of their neighbours. Based on a specific measure, the association of the neighbouring species with the genotypes of the target species or that of the genotypes with the neighbouring species was quantified. Since only AAT and HEK of the five analysed enzyme systems differed in their genotype frequencies among several tree groups of the same target species, a potential involvement of their enzymatic function in the observed differences was discussed. The results of this study demonstrate a fine-scale genetic differentiation within single tree species of forest communities, which may be the result of biotic interactions between the genetic structure of a species and the species composition of its community. This observation also suggests the importance of intraspecific genetic variation for interspecific adaptation.

scholarly journals Assessment of the Genetic Diversity in Forest Tree Populations Using Molecular Markers

Diversity ◽  
2014 ◽  
Vol 6 (2) ◽  
pp. 283-295 ◽  
Author(s):  
Ilga Porth ◽  
Yousry El-Kassaby
Keyword(s):  
Genetic Diversity ◽  
Molecular Markers ◽  
Forest Tree

scholarly journals Genetic diversity in introduced Douglas-fir and its natural regeneration in Central Europe

2019 ◽  
Vol 93 (4) ◽  
pp. 535-544
Author(s):  
Charalambos Neophytou ◽  
Marcela van Loo ◽  
Hubert Hasenauer
Keyword(s):  
Genetic Diversity ◽  
Central Europe ◽  
Natural Regeneration ◽  
Forest Tree ◽  
Douglas Fir ◽  
Native Forest ◽  
Next Generation ◽  
Planted Forests ◽  
Seed Sources ◽  
The 19Th Century

Abstract Since its first introduction in the 19th century, Douglas-fir has become the economically most important non-native forest tree species in Central European countries. Many of these planted forests are important seed sources and/or exhibit natural regeneration. Thus, it is important to assess (1) the genetic diversity of the mature stands and (2) if the genetic diversity can be passed on to the next generations. In order to address these issues, we genotyped mature Douglas-fir individuals and natural regeneration from >100 native and non-native populations using nuclear microsatellite markers. We compared the genetic diversity of native North American populations with mature Douglas-fir populations in Central Europe. The results show that genetic diversity did not differ significantly between European populations and the assigned native origin. Using a subset of 36 sites from Central Europe, we detected a significant reduction in the genetic diversity of adult versus naturally regenerated juvenile trees, indicating a bottleneck effect in the next generation of European Douglas-fir stands. The main reason may be that the mature European Douglas-fir stands are highly fragmented and thus the stand size is not adequate for transmitting the genetic diversity to the next generation. This should be taken into account for the commercial harvesting of seed stands. Seed orchards may offer a potential alternative in providing high quality and genetically diverse reproductive material.

Distinguishing forest tree communities in Kibale National Park, western Uganda using ordination and classification methods

2007 ◽  
Vol 45 (s3) ◽  
pp. 99-108 ◽  
Author(s):  
Patrick Mucunguzi ◽  
John Kasenene ◽  
Jeremy Midgley ◽  
Paul Ssegawa ◽  
John R. S. Tabuti
Keyword(s):  
National Park ◽  
Forest Tree ◽  
Kibale National Park ◽  
Classification Methods ◽  
Tree Communities ◽  
Western Uganda

scholarly journals Comparative metabolomics of forest communities: Species differences in foliar chemistry are greater in the tropics

2018 ◽  
Author(s):  
Brian E. Sedio ◽  
John D. Parker ◽  
Sean M. McMahon ◽  
S. Joseph Wright
Keyword(s):  
Secondary Metabolites ◽  
Species Differences ◽  
Phylogenetic Signal ◽  
Niche Differentiation ◽  
Interspecific Variation ◽  
Forest Tree ◽  
Microbial Pathogens ◽  
Molecular Networks ◽  
Secondary Chemistry ◽  
Tree Communities

AbstractInterspecific variation in the secondary metabolites of plants constrains host specificity of insect herbivores and microbial pathogens. The intensity and specificity of these plant-pest interactions is widely believed to increase towards the Equator, leading to the prediction that secondary metabolites should differ more among co-occurring plant species in tropical communities than in temperate communities. To evaluate this prediction, we quantified metabolomic similarity for 203 tree species that represent >89% of all individuals in large forest plots in Maryland and Panama. We constructed molecular networks based on mass spectrometry of all 203 species, quantified metabolomic similarity for all pairwise combinations of species, and evaluated how pairwise metabolomic similarity varies phylogenetically. Leaf metabolomes exhibited clear phylogenetic signal for the temperate plot, with high similarity among congeneric species. In contrast, leaf metabolomes lacked phylogenetic signal for the tropical plot, with low similarity among congeners. Our results suggest that species differences in secondary chemistry comprise important axes of niche differentiation among tropical trees, especially within species-rich genera, and that the contribution of species differences in secondary chemistry to niche differences increases towards the equator in forest tree communities.

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