Demography of a mediterranean microtine: the Mediterranean pine vole,Microtus duodecimcostatus

Oecologia ◽  
1993 ◽  
Vol 95 (1) ◽  
pp. 47-53 ◽  
Author(s):  
E. Paradis ◽  
G. Guédon
Keyword(s):  
The Mediterranean ◽  
Microtus Duodecimcostatus ◽  
Mediterranean Pine

Body mass dynamics in the Mediterranean pine vole Microtus duodecimcostatus

1998 ◽  
Vol 245 (3) ◽  
pp. 299-305 ◽  
Author(s):  
Emmanuel Paradis ◽  
Xiaoming Wang ◽  
Gerald Guedon ◽  
Henri Croset
Keyword(s):  
Body Mass ◽  
The Mediterranean ◽  
Microtus Duodecimcostatus ◽  
Mediterranean Pine

scholarly journals Factors influencing large-scale distribution of two sister species of pine voles (Microtus lusitanicus and Microtus duodecimcostatus): the importance of spatial autocorrelation

2009 ◽  
Vol 87 (12) ◽  
pp. 1227-1240 ◽  
Author(s):  
S. M. Santos ◽  
A. P. Mira ◽  
M. L. Mathias
Keyword(s):  
Spatial Autocorrelation ◽  
Large Scale ◽  
Acid Soils ◽  
Species Distributions ◽  
Relative Effect ◽  
Sister Species ◽  
Spatial Characteristics ◽  
The Mediterranean ◽  
Microtus Duodecimcostatus ◽  
Mediterranean Pine

The Lusitanian pine vole ( Microtus lusitanicus (Gerbe, 1879)) and the Mediterranean pine vole ( Microtus duodecimcostatus de Selys-Longchamps, 1839) are sister species with burrowing habits and a restricted European distribution. Our aim was to assess the relative effect of environmental, soil, and spatial characteristics on the distribution of these species in Portugal, and obtain predicted occurrence maps for each species, particularly to identify areas of sympatry. We used spatial eigenvector mapping (SEVM) to describe the spatial autocorrelation in species data, and we partitioned the variance in species distributions to quantify the relative effects of environmental, soil, and spatial characteristics. The spatial variables explained the major part of variability in both species distributions and were more important than environmental or soil variables. The Lusitanian pine vole occurs in areas outside landscape units of grassland, higher rainfall, frost, and cambisols, with mostly acid soils, lower abundance of litosols, and presence of solonshaks. The Mediterranean pine vole is distributed in grassland areas within intermediate values of soil pH, dominated by litosols and luvisols, and lower rainfall, frost, and cambisols. Our results showed disjunct sympatric areas of small size and a parapatry boundary for the centre of Portugal, suggesting that contact zones are probably narrow.

Assessment of habitat quality in the Mediterranean pine vole (Microtus duodecimcostatus) by the study of survival rates

1995 ◽  
Vol 73 (8) ◽  
pp. 1511-1518 ◽  
Author(s):  
Emmanuel Paradis ◽  
Henri Croset
Keyword(s):  
Habitat Quality ◽  
Survival Rates ◽  
Population Models ◽  
Apple Orchards ◽  
High Quality ◽  
Open Population ◽  
Asynchronous Control ◽  
The Mediterranean ◽  
Microtus Duodecimcostatus ◽  
Mediterranean Pine

Habitat quality should be usefully defined in a demographic perspective. Survival and fecundity rates are sufficient to allow population persistence in a high-quality habitat but not in a low-quality habitat. The Mediterranean pine vole (Microtus duodecimcostatus) occurs in apple orchards in southern France, but its populations in this habitat are often driven to extinction by chemical control. However, recolonization occurs promptly when control ceases. We tested the hypothesis that meadows surrounding the orchards are high-quality habitats (sources) for the Mediterranean pine vole. We livetrapped four populations, three in apple orchards and one in a meadow. Survival rates were estimated using probabilistic open-population models. Our analysis led us to conclude that meadows are low-quality habitats, particularly since no juveniles survived in this habitat during the main part of the study. Recolonization of chemically controlled patches is probably allowed by asynchronous control among orchards. We further discuss the usefulness of probabilistic open-population models for the investigation of variations in survival rates both within and between populations.

scholarly journals Mediterranean Pine Vole, Microtus duodecimcostatus: A Paradigm of an Opportunistic Breeder

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1639
Author(s):  
Miguel Lao-Pérez ◽  
Diaa Massoud ◽  
Francisca M. Real ◽  
Alicia Hurtado ◽  
Esperanza Ortega ◽  
...  
Keyword(s):  
Mammalian Species ◽  
Geographic Area ◽  
Breeding Period ◽  
Functional Regression ◽  
The Earth ◽  
Poplar Plantations ◽  
Microtus Duodecimcostatus ◽  
Mediterranean Pine ◽  
Animal House ◽  
Testis Regression

Most mammalian species of the temperate zones of the Earth reproduce seasonally, existing a non-breeding period in which the gonads of both sexes undergo functional regression. It is widely accepted that photoperiod is the principal environmental cue controlling these seasonal changes, although several exceptions have been described in other mammalian species in which breeding depends on cues such as food or water availability. We studied the circannual reproductive cycle in males of the Mediterranean pine vole, Microtus duodecimcostatus, in the Southeastern Iberian Peninsula. Morphological, hormonal, functional, molecular and transcriptomic analyses were performed. As reported for populations of other species from the same geographic area, male voles captured in wastelands underwent seasonal testis regression in summer whereas, surprisingly, those living either in close poplar plantations or in our animal house reproduced throughout the year, showing that it is the microenvironment of a particular vole subpopulation what determines its reproductive status and that these animals are pure opportunistic, photoperiod-independent breeders. In addition, we show that several molecular pathways, including MAPK, are deregulated and that the testicular “immune privilege” is lost in the inactive testes, providing novel mechanisms linking seasonal testosterone reduction and testis regression.

scholarly journals Remote-sensing and tree-ring based characterization of forest defoliation and growth loss due to the Mediterranean pine processionary moth

2014 ◽  
Vol 320 ◽  
pp. 171-181 ◽  
Author(s):  
Gabriel Sangüesa-Barreda ◽  
J. Julio Camarero ◽  
Alberto García-Martín ◽  
Rodolfo Hernández ◽  
Juan de la Riva
Keyword(s):  
Remote Sensing ◽  
Tree Ring ◽  
Pine Processionary Moth ◽  
Processionary Moth ◽  
Growth Loss ◽  
The Mediterranean ◽  
Mediterranean Pine

scholarly journals How Do Mediterranean Pine Trees Respond to Drought and Precipitation Events along an Elevation Gradient?

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 758 ◽  
Author(s):  
Sonja Szymczak ◽  
Martin Häusser ◽  
Emilie Garel ◽  
Sébastien Santoni ◽  
Frédéric Huneau ◽  
...  
Keyword(s):  
Tree Growth ◽  
Elevation Gradient ◽  
Growth Patterns ◽  
Precipitation Event ◽  
Cold Environments ◽  
Pine Trees ◽  
The Mediterranean ◽  
Mediterranean Pine ◽  
Study Sites ◽  
Precipitation Events

Drought is a major factor limiting tree growth and plant vitality. In the Mediterranean region, the length and intensity of drought stress strongly varies with altitude and site conditions. We used electronic dendrometers to analyze the response of two native pine species to drought and precipitation events. The five study sites were located along an elevation gradient on the Mediterranean island of Corsica (France). Positive stem increment in the raw dendrometer measurements was separated into radial stem growth and stem swelling/shrinkage in order to determine which part of the trees’ response to climate signals can be attributed to growth. Precipitation events of at least 5 mm and dry periods of at least seven consecutive days without precipitation were determined over a period of two years. Seasonal dynamics of stem circumference changes were highly variable among the five study sites. At higher elevations, seasonal tree growth showed patterns characteristic for cold environments, while low-elevation sites showed bimodal growth patterns characteristic of drought prone areas. The response to precipitation events was uniform and occurred within the first six hours after the beginning of a precipitation event. The majority of stem circumference increases were caused by radial growth, not by stem swelling due to water uptake. Growth-induced stem circumference increase occurred at three of the five sites even during dry periods, which could be attributed to stored water reserves within the trees or the soils. Trees at sites with soils of low water-holding capacity were most vulnerable to dry periods.

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