scholarly journals Spatial heterogeneity and woody species distribution in a Schinopsis balansae (Anacardiaceae) forest of the Southern Chaco, Argentina

2015 ◽  
pp. 515-524
Author(s):  
I M Barberis ◽  
E F Pire ◽  
J P Lewis
Keyword(s):  
Spatial Heterogeneity ◽  
Species Distribution ◽  
Woody Species ◽  
Santa Fe ◽  
Schinopsis Balansae

El objeto de esle trabfljo es analizarla ,heterogeneidad espacial de un bosque de Schinopsis balansae ("Quebrachal") cerca de Vera (Santa Fe, Argentina) y establecer sí ,hay correlaCión entre la distribución de las especies leñosas y los factores ambient,ales.Este tipo de bosque es la comunidad vegetal más importante de la Cuña Boscosa. de Santa Fe, que es la. porción más austral del Chaco Oriental. En un stand, parcialmente recuperado se instalaron 32 parcelas contiguas de 10 x 10 m a lo largo de dos transectas. Se cartografiaron todos los individuos de las distintas especies de leñosas, así como los distintos micrositios caracterizados por el microrelieve, humedad del suelo y presencia de bromeliáceas terrestres. El 54% del suelo es plano, la mitad del cual es barroso o está .frecuentemente inundado, y algo más del JI % es cóncavo y está casi siempre inundado, La mayor parte de las leñosas crecen en micro sitios bien drenados mientras ,que en suelos ,muy húmedos solamente crecen Geoffroea decorticans, Prosopis spp. y S. balansae, Los resultados obtenidos sugieren que la heterogeneidad del suelo, (microrrelieve y humedad) es el factor más importante que determina la distribuc:ión de las especies leñosas sobre el terreno.

scholarly journals Structure, physiognomy and floristic composition of a Schinopsis balansae (Anacardiaceae) forest in the Southern Chaco, Argentina

2018 ◽  
pp. 1013-1020
Author(s):  
Juan Pablo Lewis ◽  
Eduardo F. Pire ◽  
Ignacio M. Barberis
Keyword(s):  
Complex Structure ◽  
Floristic Composition ◽  
Woody Species ◽  
Leaf Size ◽  
Santa Fe ◽  
Crown Diameter ◽  
Gran Chaco ◽  
Open Forest ◽  
Layer 2 ◽  
Schinopsis Balansae

Amazonia and the Gran Chaco are the largest phytogeographic units of tropical and subtropical South America. The Santa Fe Forest Wedge is the southernmost portion of the Eastern Chaco, where the Schinopsis balansae forest (Quebrachal) is the most widespread and characteristic community. A detailed analysis of the floristic composition, physiognomy and vegetation structure was carried out in 32 10x10 m contiguous plots sampled along two transects in one of the these forests near Vera. Province of the Santa Fe, Argentina. All woody individuals 0.6 m present in the plots were recorded, identified and there their height and crown diameter measured. With These data, cartographic diagrams and vegetation profiles were drawn. Woody species were classified according to leaf size, leaf texture, presence of spines and phenology. This quebrachal is an open forest of very complex structure and heterogeneous floristic composition. The majority of woody species in this forest are deciduous, with small leaves and often with spiny structures. It has two high arboreal strata of S. balansae and Acacia praecox. and one arboreal low of Achatocarpus praecox with juvenile individuals of the species of the upper strata. There is also a shrub layer 2 m high. The arboreal canopy is discontinuous and has openings that can be quite large, where the ground is covered by a dense, grainy layer. This forest is similar to other S balansae forests of the Santa Fe Forest, but very different from most forests in other areas of the Gran Chaco.

Edaphic properties as key drivers for woody species distributions in tropical savannic and forest habitats

2019 ◽  
Vol 67 (1) ◽  
pp. 70
Author(s):  
P. M. S. Rodrigues ◽  
J. O. Silva ◽  
C. E. G. R. Schaefer
Keyword(s):  
Plant Species ◽  
Species Distribution ◽  
Soil Texture ◽  
Woody Species ◽  
Nutrient Status ◽  
Significant Response ◽  
Unimodal Response ◽  
The Individual ◽  
Edaphic Gradients ◽  
Forest Habitats

Edaphic gradients can explain plant species distribution at a local scale in the neotropics and elsewhere, but few studies have evaluated the individual responses of species to such gradients. We collected data on species and soils in open savannic and forest formations (totalling five habitats in each formation), aiming to evaluate the importance of edaphic factors on the distribution of woody plant species in tropical habitats. Logistic regression was used to test the influence of predictor variables (soil texture and fertility) on plant occurrence (presence or absence). Most species (73%) responded to the edaphic gradients. However, the edaphic gradients did not explain the distribution of the remaining 27% of species, which implies the existence of other factors determining their occurrence. Soil fertility (nutritional status) was the major factor in forest habitats (65% of the species which showed significant response), while soil texture was the most explanatory factor for species occurrence in open habitats (55% of the species that showed a significant response). Thus, nutrient status was less limiting and soil texture was more limiting in savannic formations, whereas the opposite was observed for forest formations. Most species showing a relationship with edaphic gradients had a unimodal response, which is in accordance with the literature. Our study showed that soil properties largely regulate the distribution of plant species in tropical habitats, despite other factors not investigated here also having an effect on several of the studied species. Models of species distribution that take into account environmental heterogeneity are key for the elaboration of strategies for the conservation and restoration of ecosystems.

scholarly journals Woody species distribution across a savanna-dry forest soil gradient in the Brazilian Cerrado

2023 ◽  
Vol 83 ◽  
Author(s):  
G. A. Paula ◽  
E. Fischer ◽  
M. Silveira ◽  
H. Almeida ◽  
E. van den Berg
Keyword(s):  
Species Distribution ◽  
Species Turnover ◽  
Woody Species ◽  
Dry Forest ◽  
Base Saturation ◽  
Available Phosphorus ◽  
Sharp Transition ◽  
Physical Chemical ◽  
Aluminum Saturation ◽  
Chemical Traits

Abstract Although richness and distribution of woody species in the Cerrado physiognomies have been extensively studied, the shifts of woody species from savanna physiognomies to dry forests have not yet been addressed. Here, we investigate the effect of soil physical-chemical traits on the woody species turnover between adjacent cerrado stricto sensu and dry forest physiognomies. Woody species were surveyed, and soil and topographic variables measured, in 30 10×40 m plots systematically distributed, with 15 plots in each physiognomy. We found a spatially structured distribution of woody species, and differences of soil traits between cerrado stricto sensu and dry forest areas, mainly related to the aluminum saturation, base saturation, and available phosphorus. Aluminum saturation increased toward the savanna area, while base saturation increased toward the dry forest. Most woody species predominated in one physiognomy, such as Callisthene major in the cerrado stricto sensu and Anadenanthera colubrina in the dry forest. Only 20% of the species were widely distributed across both physiognomies or, not often, restricted to the intermediary values of the soil gradient. General results indicate that contrasting soil traits between cerrado stricto sensu and dry forest produce a strongly spatially organized and sharp transition in terms of species distribution between these physiognomies.

An ecohydrological approach to predicting regional woody species distribution patterns in dryland ecosystems

2010 ◽  
Vol 33 (2) ◽  
pp. 215-230 ◽  
Author(s):  
Trenton E. Franz ◽  
Kelly K. Caylor ◽  
Jan M. Nordbotten ◽  
Ignacio Rodríguez-Iturbe ◽  
Michael A. Celia
Keyword(s):  
Species Distribution ◽  
Woody Species ◽  
Distribution Patterns ◽  
Dryland Ecosystems

Does spatial heterogeneity blur the signature of dispersal syndromes on spatial patterns of woody species? A test in a tropical dry forest

Oikos ◽  
2015 ◽  
Vol 124 (10) ◽  
pp. 1360-1366 ◽  
Author(s):  
Andrea Jara-Guerrero ◽  
Marcelino De la Cruz ◽  
Carlos I. Espinosa ◽  
Marcos Méndez ◽  
Adrián Escudero
Keyword(s):  
Spatial Heterogeneity ◽  
Spatial Patterns ◽  
Tropical Dry Forest ◽  
Woody Species ◽  
Dry Forest ◽  
Dispersal Syndromes

scholarly journals Análisis florísticoestructural de los núcleos boscosos espontáneos del parque J. F. Villarino (Zavalla, Santa Fe, Argentina) Floristic-structural analysis of spontaneous little forests in the J. F. Villarino park (Santa Fe, Argentina)

1970 ◽  
Vol 48 (2) ◽  
pp. 301-314 ◽  
Author(s):  
Eduardo E. Franceschi ◽  
Silvia Boccanelli
Keyword(s):  
Structural Analysis ◽  
Light Intensity ◽  
Woody Species ◽  
Ground Level ◽  
Santa Fe ◽  
Soil Humidity ◽  
Acer Negundo ◽  
Ligustrum Lucidum ◽  
Plot Sampling ◽  
Los Grupos

Summary: Floristic-structural analysis of spontaneous little forests in the J. F. Villarino park (Santa Fe, Argentina). The anthropization process in the Pampean grassland has brought about an increasing presence of trees. In this study we analyzed the structure and composition of little forests which have resulted from the spontaneous multiplication of tree species in the J. F. Villarino Park, in Zavalla, Province of Santa Fe, Argentina. Using a plot sampling method, individuals were counted to determine density per species in the upper and treelets strata. Height and DBH of individuals in the upper stratum were recorded. Abundance-coverage of herbaceous and woody species saplings was estimated in the lower stratum. Soil humidity and ground-level light intensity were measured. Data were analyzed using multivariate methods. Three types of little forests were identified: a mixed one, another dominated by Acer negundo and a third with dominance of Ligustrum lucidum. Differences in DBH-height relationship were significant among the three groups. Soil humidity and light intensity did not differ significantly. Young individuals of the dominant species in the upper stratum are found in the under-storey. The lower herbaceous stratum is discontinuous. These forests contain many native species.Key words: Acer negundo, exotic species, invasive woody plants, Ligustrum lucidum, native invasive species, Pampas trees, patches.Resumen: Con la antropización de la región pampeana fue creciendo en importancia la presencia del árbol. El objetivo de este trabajo es analizar la composición y estructura de los núcleos boscosos resultantes de la multiplicación espontánea de especies arbóreas en el parque J. F. Villarino en la provincia de Santa Fe (Argentina). En un muestreo se contaron los individuos y determinó densidad por especie del estrato superior y renovales. Se registró altura y DAP de los individuos del estrato superior. En el estrato inferior la abundancia-cobertura de juveniles de leñosas y herbáceas fue estimada para cada especie. Se midió humedad del suelo e intensidad de la luz a nivel del suelo. Los datos se analizaron fundamentalmente con métodos multivariados. Se reconocieron tres tipos de núcleos boscosos: uno Mixto y dos con dominancia de Acer negundo y Ligustrum lucidum respectivamente. La relación entre DAP y altura resultó significativamente diferente entre los grupos. No se encontraron diferencias significativas de humedad e intensidad de luz entre los grupos. Las especies dominantes en el estrato superior presentan individuos jóvenes en el sotobosque. El estrato inferior herbáceo es discontinuo. Estos núcleos boscosos contienen muchas especies nativas.Palabras clave: Acer negundo, árboles en la pampa, exóticas, invasoras nativas, leñosas invasoras, Ligustrum lucidum, parches.

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