Changes in plant interactions along a gradient of environmental stress

Pugnaire, Francisco I.; Luque, Maria T.

doi:10.1034/j.1600-0706.2001.930104.x

Cited by 387 publications

(326 citation statements)

References 46 publications

Supporting

Mentioning

295

Contrasting

Unclassified

Order By: Relevance

“…in woody patches), when the precipitation rate is low. This prediction is in line with recent field observations along rainfall gradients and along other gradients of environmental stress [45,41,46,47,42]. …”

Section: Patch-scale Responsesupporting

confidence: 75%

See 1 more Smart Citation

Modeling Dryland Landscapes

Meron

2010

Math. Model. Nat. Phenom.

View full text Add to dashboard Cite

Abstract. The discovery of nearly periodic vegetation patterns in arid and semi-arid regions motivated numerous model studies in the past decade. Most studies have focused on vegetation pattern formation, and on the response of vegetation patterns to gradients of the limiting water resource. The reciprocal question, what resource modifications are induced by vegetation pattern formation, which is essential to the understanding of dryland landscapes, has hardly been addressed. This paper is a synthetic review of model studies that address this question and the consequent implications for inter-specific plant interactions and species diversity. It focuses both on patch and landscape scales, highlighting bottom-up processes, where plant interactions at the patch scale give rise to spatial patterns at the landscape scale, and top-down processes, where pattern transitions at the landscape scale affect inter-specific interactions at the patch scale.

show abstract

Section: Patch-scale Responsesupporting

confidence: 75%

“…Indeed, woody patches in arid regions often facilitate the growth of herbaceous species, such as annuals [41,42]. Species that have the capacity to modify the abiotic environment in ways that facilitate the growth of other species are called ecosystem engineers [43,44].…”

Section: Resource Dynamics 41 Plants As Ecosystem Engineersmentioning

confidence: 99%

Modeling Dryland Landscapes

Meron

2010

Math. Model. Nat. Phenom.

View full text Add to dashboard Cite

show abstract

“…Our work also suggests important interactions between biotic and abiotic sources of resistance-the characteristics of the physical environment determined the outcome of species interactions (Connell 1961;Pugnaire and Luque 2001;Callaway et al 2002). We found that the eVect of competition from the resident community on Bromus growth and seed production depended on the resource environment.…”

Section: Discussionmentioning

confidence: 77%

Abiotic and biotic resistance to grass invasion in serpentine annual plant communities

2009

View full text Add to dashboard Cite

Biological invasions severely impact native plant communities, causing dramatic shifts in species composition and the restriction of native species to spatially isolated refuges. Competition from resident species and the interaction between resource limitation and competition have been overlooked as mechanisms of community resistance in refugia habitats. We examined the importance of these factors in determining the resistance of California serpentine plant communities to invasion by three common European grasses, Avena barbata, Bromus diandrus, and Hordeum murinum. We added seeds of each of these grasses to plots subjected to six levels of resource addition (N, P, Ca, H 2 O, all resources together, and a no-addition control) and two levels of competition (with resident community present or removed). Resource limitation and competition had strong eVects on the biomass and reproduction of the three invaders. The addition of all resources together combined with the removal of the resident community yielded individual plants that were fourfold to 20-fold larger and sixfold to 20-fold more fecund than plants from control plots. Competitor removal alone yielded invaders that were twofold to sevenfold larger and twofold to ninefold more fecund. N addition alone or in combination with other resources led to a twofold to ninefold increase in the biomass and fecundity of the invaders. No other resource alone signiWcantly aVected native or invader performance, suggesting that N was the key limiting resource during our experiment. We found a signiWcant interaction between abiotic and biotic resistance for Bromus, which experienced increased competitive suppression in fertilized plots. The threefold increase in resident biomass with N addition was likely responsible for this result. Our results conWrm that serpentine plant communities are severely N limited, which, in combination with competition from resident species, promotes the resistance of these systems to invasions. Our work suggests that better understanding the relative sensitivities of invaders and residents to the physical environment is critical to predicting how abiotic and biotic factors interact to determine community resistance.

show abstract

“…The relatively flat grassland and cropland landscapes may modify the influence of topography on the water conditions which are not represented by a DEM (Band et al 1993). Vegetation growth is sensitive to differences in fertility (Pugnaire and Luque 2001;Elgersma and Dhillion 2002), soil acidity (Pärtel et al 2007), soil depth (Zelený and Chytrý 2007) and electrolytic conductivity. Additionally, the dominant vegetation type relates strongly to soil moisture retention characteristics (Jager 1982).…”

Section: Discussionmentioning

confidence: 99%

Topographic controls on vegetation index in a hilly landscape: a case study in the Jiaodong Peninsula, eastern China

et al. 2012

View full text Add to dashboard Cite

This study examined topographic influence on spatial and temporal variability in the normalized difference vegetation index (NDVI) derived from the Satellite Pour l'Observation de la Terre-Vegetation at the regional and landscape scales in the Jiaodong Peninsula. The generalized additive models were used to quantify the spatial variation of NDVI attributable to local terrain and topographically related variables including altitude, exposure to incoming solar radiation, topographic wetness index, distance to the nearest stream and distance from the coast. NDVI distribution shows significant dependence on topography. The variables explained 38.3 % of variance in NDVI at the peninsula, and 30-45.3 % of variance in NDVI at the woodland, cropland, and grassland landscapes. At the Jiaodong Peninsula scale, NDVI is influenced primarily by distance from the coast. However, topographic wetness index has the most explanatory power for NDVI at the woodland, cropland, and grassland landscapes. Through a statistical nonparametric correlation analysis (Spearman's r), the study indicates that spatial distribution of NDVI changes during the period 1998-2009 and future change trend of persistence determined by Hurst exponent is closely associated with topography and topography-based attribution. These results highlight the importance of topographic changes at landscape and regional scales as an important control factor on NDVI patterns.

show abstract

Changes in plant interactions along a gradient of environmental stress

Cited by 387 publications

References 46 publications

Modeling Dryland Landscapes

Modeling Dryland Landscapes

Abiotic and biotic resistance to grass invasion in serpentine annual plant communities

Topographic controls on vegetation index in a hilly landscape: a case study in the Jiaodong Peninsula, eastern China

Contact Info

Product

Resources

About