scholarly journals Cryptic species and hidden ecological interactions of halictine bees along an elevational gradient

2021 ◽  
Author(s):  
Antonia V. Mayr ◽  
Alexander Keller ◽  
Marcell K. Peters ◽  
Gudrun Grimmer ◽  
Beate Krischke ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Elevational Gradient ◽  
Ecological Interactions ◽  
Halictine Bees

Ecological Interactions between Two Broadly Sympatric, Cryptic Species of Dusky Salamander (GenusDesmognathus)

Copeia ◽  
2013 ◽  
Vol 2013 (3) ◽  
pp. 499-506 ◽  
Author(s):  
Carlos D. Camp ◽  
Jessica A. Wooten ◽  
Caitlin M. Corbet ◽  
Eden A. Dulka ◽  
Joshua A. Mitchem ◽  
...  
Keyword(s):  
Cryptic Species ◽  
Ecological Interactions

Functional evenness of bird communities varies along the elevational gradient in Europe: Conservation implications

2019 ◽  
Author(s):  
Federico Morelli ◽  
Yanina
Keyword(s):  
Species Richness ◽  
Elevation Gradient ◽  
Bird Species ◽  
Elevational Gradient ◽  
Negative Association ◽  
Bird Communities ◽  
Breeding Bird ◽  
Bird Species Richness ◽  
Large Spatial Scale ◽  
Functional Evenness

ContextThe negative association between elevation and species richness is a well-recognized pattern in macro-ecology. ObjectivesThe aim of this study was to investigate changes in functional evenness of breeding bird communities along an elevation gradient in Europe. MethodsUsing the bird data from the EBCC Atlas of European Breeding Birds we estimated an index of functional evenness which can be assumed as a measure of the potential resilience of communities.ResultsOur findings confirm the existence of a negative association between elevation and bird species richness in all European eco regions. However, we also explored a novel aspect of this relationship, important for conservation: Our findings provide evidence at large spatial scale of a negative association between the functional evenness (potential community resilience) and elevation, independent of the eco region. We also found that the Natura2000 protected areas covers the territory most in need of protection, those characterized by bird communities with low potential resilience, in hilly and mountainous areas.ConclusionsThese results draw attention to European areas occupied by bird communities characterized by a potential lower capacity to respond to strong ecological changes, and, therefore, potentially more exposed to risks for conservation.

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

Propriété contre possession: les conflits liés aux plantations industrielles d'arbres | Property rights vs. common law possession: conflicts surrounding industrial tree plantations

2007 ◽  
Vol 158 (3-4) ◽  
pp. 65-69 ◽  
Author(s):  
Julien-François Gerber ◽  
Rolf Steppacher
Keyword(s):  
Property Rights ◽  
Common Law ◽  
Sustainable Use ◽  
Institutional Logics ◽  
Local Communities ◽  
Tree Plantations ◽  
Ecological Interactions ◽  
Abstract Logic ◽  
Property Versus ◽  
Concrete Logic

This article proposes a new way of looking at social conflicts relating to industrial tree plantations by arguing that such conflicts reflect the struggle between two distinct institutional logics, i.e., property versus possession. The abstract logic of property, enhanced by credit relations and the minimization of costs, stimulates commercial plantations and tends to be detrimental to the environment. By contrast, the concrete logic of possession forces local communities to take account of complex local social and ecological interactions, and thereby encourages a sustainable use of the forest.

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