scholarly journals Linking life-history traits, spatial distribution and abundance of two species of lugworms to bait collection: A case study for sustainable management plan

2018 ◽  
Vol 140 ◽  
pp. 433-443 ◽  
Author(s):  
Lola De Cubber ◽  
Sébastien Lefebvre ◽  
Charline Fisseau ◽  
Vincent Cornille ◽  
Sylvie Marylène Gaudron
Keyword(s):  
Spatial Distribution ◽  
Life History ◽  
Sustainable Management ◽  
Life History Traits ◽  
Management Plan

scholarly journals The Influence of Increased Salvage Felling on Forwarding Distance and the Removal—A Case Study from Croatia

Forests ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 7
Author(s):  
Andreja Đuka ◽  
Zoran Bumber ◽  
Tomislav Poršinsky ◽  
Ivica Papa ◽  
Tibor Pentek
Keyword(s):  
Spatial Distribution ◽  
Management Plan ◽  
Management Unit ◽  
Negative Effects ◽  
Forest Operations ◽  
Spatial Reference ◽  
Infrastructure Network ◽  
Gis Environment ◽  
Research Period

During the seven-year research period, the average annual removal was by 3274 m3 higher than the average annual removal prescribed by the existing management plan (MP). The main reason lies in the high amount of salvage felling volume at 55,238 m3 (38.3%) in both the main and the intermediate felling due to oak dieback. The analysis of forest accessibility took into account the spatial distribution of cutblocks (with ongoing felling operations) and the volume of felled timber for two proposed factors: (1) the position of the cutblock and (2) the position of the removal. Cutblock position factor took into account the spatial position of the felling areas/sites, while removal position factor besides the spatial reference took into account the amount of felled timber (i.e., volume) both concerning forest infrastructure network and forest operations. The analysed relative forest openness by using geo-processing workflows in GIS environment showed four types of opening areas in the studied management unit (MU): single-opened, multiple-opened, unopened and opened areas outside of the management unit. Negative effects of the piece-volume law and low harvesting densities on forest operations are highlighted in this research due to high amount of salvage felling particularly in the intermediate felling by replacing timber volume that should have come from thinnings.

scholarly journals Spatial distribution of life-history traits and their response to environmental gradients across multiple marine taxa

Ecosphere ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. e02460 ◽  
Author(s):  
Laurene Pecuchet ◽  
Gabriel Reygondeau ◽  
William W. L. Cheung ◽  
Priscilla Licandro ◽  
P. Daniel van Denderen ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Life History ◽  
Life History Traits ◽  
Environmental Gradients

scholarly journals Exploring the role of life history traits and introduction effort in understanding invasion success in mammals: A case study of Barbary ground squirrels

2020 ◽  
Author(s):  
Annemarie van der Marel ◽  
Jane M. Waterman ◽  
Marta López-Darias
Keyword(s):  
Invasive Species ◽  
Life History ◽  
Life History Traits ◽  
Ground Squirrels ◽  
Invasion Success ◽  
Biodiversity And Ecosystem Function ◽  
Main Factors ◽  
Main Factor

AbstractInvasive species –species that have successfully overcome the barriers of transport, introduction, establishment, and spread– are a risk to biodiversity and ecosystem function. Introduction effort is one of the main factors attributed to invasion success, but life history traits are also important as they influence population growth. In this contribution, we first investigated life history traits of the Barbary ground squirrel, Atlantoxerus getulus, a species with a remarkably low introduction effort, and studied whether their exceptional invasion success is due to a very fast life history profile through a comparison of these traits to other successfully invaded mammals. We then examined whether number of founders and/or a fast life history influences invasion success of squirrels. We found that Barbary ground squirrels were on the fast end of the “fast-slow continuum”, but their life history is not the only contributing factor for their invasion success, as the life history profile is comparable to other invasive species that do not have such a low introduction effort. We also found that neither life history traits nor number of founders explained invasion success of introduced squirrels in general. These results contradict the concept that introduction effort is the main factor explaining invasion success, especially in squirrels. Instead, we argue that invasion success can be influenced by multiple aspects of the new habitat or the biology of the introduced species.

scholarly journals Evolution of life-history traits and mating strategy in males: a case study on two populations of aDrosophilaparasitoid

2015 ◽  
Vol 117 (2) ◽  
pp. 231-240 ◽  
Author(s):  
Joan van Baaren ◽  
Claire M.-S. Dufour ◽  
Jean-Sébastien Pierre ◽  
Véronique Martel ◽  
Philippe Louâpre
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Mating Strategy ◽  
Evolution Of Life ◽  
Two Populations

scholarly journals Selection is stronger in early-versus-late stages of divergence in a Neotropical livebearing fish

2016 ◽  
Vol 12 (3) ◽  
pp. 20151022 ◽  
Author(s):  
Spencer J. Ingley ◽  
Jerald B. Johnson
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Single Point ◽  
Evolutionary Trajectory ◽  
Trait Evolution ◽  
The Difference ◽  
Livebearing Fish ◽  
Late Stages ◽  
Over Time

How selection acts to drive trait evolution at different stages of divergence is of fundamental importance in our understanding of the origins of biodiversity. Yet, most studies have focused on a single point along an evolutionary trajectory. Here, we provide a case study evaluating the strength of divergent selection acting on life-history traits at early-versus-late stages of divergence in Brachyrhaphis fishes. We find that the difference in selection is stronger in the early-diverged population than the late-diverged population, and that trait differences acquired early are maintained over time.

scholarly journals Batoid Abundances, Spatial Distribution, and Life History Traits in the Strait of Sicily (Central Mediterranean Sea): Bridging a Knowledge Gap through Three Decades of Survey

Animals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 2189
Author(s):  
Michele Luca Geraci ◽  
Sergio Ragonese ◽  
Danilo Scannella ◽  
Fabio Falsone ◽  
Vita Gancitano ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Life History ◽  
Life History Traits ◽  
Current Status ◽  
Distribution Analysis ◽  
Central Mediterranean ◽  
Strait Of Sicily ◽  
Abundance Trends ◽  
First Maturity ◽  
Trawl Surveys

Batoid species play a key role in marine ecosystems but unfortunately they have globally declined over the last decades. Given the paucity of information, abundance data and the main life history traits for batoids, obtained through about three decades of bottom trawl surveys, are presented and discussed. The surveys were carried out in two areas of the Central Mediterranean (South of Sicily and Malta Island), in a timeframe ranging from 1990 to 2018. Excluding some batoids, the abundance trends were stable or increasing. Only R. clavata, R. miraletus, and D. oxyrinchus showed occurrence and abundance indexes notable enough to carry out more detailed analysis. In particular, spatial distribution analysis of these species highlighted the presence of two main hotspots in Sicilian waters whereas they seem more widespread in Malta. The lengths at first maturity (L50) were 695 and 860, 635 and 574, and 364 and 349 mm total length (TL), respectively, for females and males of D. oxyrinchus, R. clavata, and R. miraletus. The asymptotic lengths (L∞) and the curvature coefficients (K) were 1365 and 1240 (K = 0.11 and 0.26), 1260 and 1100 (K = 0.16 and 0.26), and 840 and 800 mm TL (K = 0.36 and 0.41), respectively, for females and males of D. oxyrinchus, R. clavata, and R. miraletus. The lack of detailed quantitative historical information on batoids of Sicily and Malta does not allow to analytically judge the current status of the stocks, although the higher abundance of some species within Malta raises some concern for the Sicilian counterpart. In conclusion, suitable actions to protect batoids in the investigated area are recommended.

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