scholarly journals Host-mediated, cross-generational intraspecific competition in a herbivore species

2021 ◽  
Vol 1 ◽  
Author(s):  
Bastien Castagneyrol ◽  
Inge van Halder ◽  
Yasmine Kadiri ◽  
Laura Schillé ◽  
Hervé Jactel
Keyword(s):  
Intraspecific Competition ◽  
Herbivore Species

scholarly journals Predation risk indirectly enhances survival of seaweed recruits but not intraspecific competition in an intermediate herbivore species

2011 ◽  
Vol 99 (3) ◽  
pp. 807-817 ◽  
Author(s):  
Markus Molis ◽  
Inken Preuss ◽  
Annika Firmenich ◽  
Julius Ellrich
Keyword(s):  
Predation Risk ◽  
Intraspecific Competition ◽  
Herbivore Species

scholarly journals Effect of Competition and Climatic Conditions on the Growth of Beech in the Mixed Pine Beech Stand: Lithuanian Case Study

2020 ◽  
Vol 3 (1) ◽  
pp. 49
Author(s):  
Edgaras Linkevičius ◽  
Gerda Junevičiūtė
Keyword(s):  
Intraspecific Competition ◽  
Tree Species ◽  
Forest Growth ◽  
Competition Effect ◽  
Diameter Increment ◽  
Cart Analysis ◽  
Crown Width ◽  
Beech Stand ◽  
Negative Effect ◽  
The Impact

Climate change and warming will potentially have profound effects on forest growth and yield, especially for pure stands in the near future. Thus, increased attention has been paid to mixed stands, e.g., pine and beech mixtures. However, the interaction of tree species growing in mixtures still remains unknown. Thus, the aim of this study was to investigate the impact of the interspecific and intraspecific competition to diameter, height, and crown width of pine and beech trees growing in mixtures, as well as to evaluate the impact of climatic indicators to the beech radial diameter increment. The data was collected in 2017 at the mixed mature pine beech double layer stand, located in the western part of Lithuania. The sample plot of 1.2 hectare was established and tree species, diameter at the breast height, tree height, height-to-crown base, height-to-crown width, and position were measured for all 836 trees. Additionally, a representative sample of radial diameter increments were estimated only for the beech trees by taking out core discs at the height of 1 m when the stand was partially cut. Competition analysis was based on the distance-dependent competition index, which was further based on crown parameters. Climatic effect was evaluated using classification and regression tree (CART) analysis. We found almost no interspecific competition effect to diameter, height, or crown width for both tree species growing in the first layer. However, it had an effect on beeches growing in the second layer. The intraspecific competition effect was important for pine and beech trees, showing a negative effect for both of them. Our results show the possible coexistence of these tree species due to niche differentiation. An analysis of climatic indicators from 1991–2005 revealed that precipitation from February–May of the current vegetation year and mean temperatures from July to September expressed radial diameter increment effects for beech trees. Low temperatures during March and April, as well as high precipitation during January, had a negative effect on beech radial increments. From 2006–2016, the highest effect on radial diameter increments was the mean temperatures from July to September, as well as the precipitation in January of the current year. From 1991–2016, the highest effect on radial diameter increments was the temperature from July to September 1991–2016 and the precipitation in June 1991–2016. Generally, cool temperatures and higher precipitation in June had a positive effect on beech radial increments. Therefore, our results show a sensitivity to high temperatures and droughts during summer amid Lithuanian’s growth conditions.

Everybody loses: intraspecific competition induces tragedy of the commons in Allenby's gerbils

Ecology ◽  
2015 ◽  
Vol 96 (1) ◽  
pp. 54-61 ◽  
Author(s):  
Oded Berger-Tal ◽  
Keren Embar ◽  
Burt P. Kotler ◽  
David Saltz
Keyword(s):  
Intraspecific Competition ◽  
Tragedy Of The Commons ◽  
The Commons

Effects of herbivore species richness on the niche dynamics and distribution of blue sheep in the Trans-Himalaya

2009 ◽  
Vol 15 (6) ◽  
pp. 940-947 ◽  
Author(s):  
Tsewang Namgail ◽  
Charudutt Mishra ◽  
Christine B. de Jong ◽  
Sipke E. van Wieren ◽  
Herbert H. T. Prins
Keyword(s):  
Species Richness ◽  
Blue Sheep ◽  
Niche Dynamics ◽  
Herbivore Species
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