scholarly journals Prioritizing rare tree species of the Cerrado-Amazon ecotone: warnings and insights emerging from a comprehensive transitional zone of South America

2016 ◽  
Vol 14 (2) ◽  
pp. 74-82 ◽  
Author(s):  
Everton A. Maciel ◽  
Ary T. Oliveira-Filho ◽  
Pedro V. Eisenlohr
Keyword(s):  
South America ◽  
Tree Species ◽  
Transitional Zone

scholarly journals Co-occurrences of tropical trees in eastern South America: disentangling abiotic and biotic forces

Plant Ecology ◽  
2021 ◽  
Author(s):  
Emma-Liina Marjakangas ◽  
Otso Ovaskainen ◽  
Nerea Abrego ◽  
Vidar Grøtan ◽  
Alexandre A. de Oliveira ◽  
...  
Keyword(s):  
South America ◽  
Tree Species ◽  
Large Scale ◽  
Environmental Filtering ◽  
Limiting Similarity ◽  
Phylogenetic Relatedness ◽  
Biogeographical Regions ◽  
Dependent Processes ◽  
Occurrence Of Species

AbstractSpecies co-occurrences in local communities can arise independent or dependent on species’ niches. However, the role of niche-dependent processes has not been thoroughly deciphered when generalized to biogeographical scales, probably due to combined shortcomings of data and methodology. Here, we explored the influence of environmental filtering and limiting similarity, as well as biogeographical processes that relate to the assembly of species’ communities and co-occurrences. We modelled jointly the occurrences and co-occurrences of 1016 tropical tree species with abundance data from inventories of 574 localities in eastern South America. We estimated species co-occurrences as raw and residual associations with models that excluded and included the environmental effects on the species’ co-occurrences, respectively. Raw associations indicate co-occurrence of species, whereas residual associations indicate co-occurrence of species after accounting for shared responses to environment. Generally, the influence of environmental filtering exceeded that of limiting similarity in shaping species’ co-occurrences. The number of raw associations was generally higher than that of the residual associations due to the shared responses of tree species to the environmental covariates. Contrary to what was expected from assuming limiting similarity, phylogenetic relatedness or functional similarity did not limit tree co-occurrences. The proportions of positive and negative residual associations varied greatly across the study area, and we found a significant tendency of some biogeographical regions having higher proportions of negative associations between them, suggesting that large-scale biogeographical processes limit the establishment of trees and consequently their co-occurrences.

scholarly journals Characteristics of the proximal to distal regions of the petioles to identify 15 tree species of Papilionoideae-Fabaceae

1970 ◽  
Vol 14 (2) ◽  
pp. 101-115 ◽  
Author(s):  
Samia Heneidak ◽  
Abdel Samai M Shaheen
Keyword(s):  
Tree Species ◽  
Transitional Zone ◽  
Vascular Supply ◽  
Vascular Bundles ◽  
Sophora Japonica ◽  
Secretory Cavities ◽  
Plant Taxon ◽  
Sophora Davidii ◽  
Vascular Trace ◽  
Stem Leaf

Comparative studies on the structure of the vascular supply of stem-leaf transitional zone of the petioles were carried out in 15 papilionoid tree species. Anatomical characteristics and changes in the main vascular trace were recorded. The anatomical features of significance include outline; epidermal cell; pericyclic fiber patterns; main petiolar vasculature; presence, number and separation of ridge vascular bundles; presence of additional accessory ridge bundles; crystal types; secretory elements and multicellular trichomes. Erythrina variegata and Pterocarpus indicus show no change in the petiole trace structure throughout their petioles from proximal to distal, while the rest of the species have minor to major changes. Sophora secundiflora has the highest number of ridge vascular bundles (5-6), while these are absent in the two Dalbergia species, E. variegata, Derris robusta, Sophora davidii and S. japonica. Only Derris robusta and Sophora japonica show unusual petiole trace structure by having two additional accessory ridge bundles adaxial of the main trace enclosing with it by a complete ring of pericyclic fibers. The studied species of tribe Millettieae show the presence of secretory cavities lined by epithelial cells. The usefulness of these character states is shown for assessing, identifying and delimiting these examined species. Key words: Accessory ridge bundles, Crystals, Papilionoideae, Petiole anatomy, Petiole vasculature, Ridge bundles, Secretory cavities DOI: 10.3329/bjpt.v14i2.530 Bangladesh J. Plant Taxon. 14(2): 101-115, 2007 (December)

Xiphinema californicum. [Distribution map].

2006 ◽  
Author(s):  
Keyword(s):  
Zea Mays ◽  
North America ◽  
South America ◽  
Medicago Sativa ◽  
Geographical Distribution ◽  
Tree Species ◽  
Rio De Janeiro ◽  
Cocos Nucifera ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Xiphinema californicum Lamberti & Bleve-Zacheo. Nematoda: Xiphinematidae. Hosts: Citrus sp., coconut (Cocos nucifera), lucerne (Medicago sativa), maize (Zea mays), Sorghum sp., and various tree species. Information is given on geographical distribution in North America (Mexico, and California, Hawaii, Oregon and Washington, USA) and South America (Chile, Peru, and Goias, Rio de Janeiro and São Paulo, Brazil).

scholarly journals Tree species of South America central savanna: endemism, marginal areas and the relationship with other biomes

2016 ◽  
Vol 30 (1) ◽  
pp. 78-86 ◽  
Author(s):  
Renata D. Françoso ◽  
Ricardo F. Haidar ◽  
Ricardo B. Machado
Keyword(s):  
South America ◽  
Tree Species ◽  
Marginal Areas ◽  
The Relationship

scholarly journals Using tree species inventories to map biomes and assess their climatic overlaps in lowland tropical South America

2018 ◽  
Vol 27 (8) ◽  
pp. 899-912 ◽  
Author(s):  
Pedro Luiz Silva de Miranda ◽  
Ary T. Oliveira-Filho ◽  
R. Toby Pennington ◽  
Danilo M. Neves ◽  
Timothy R. Baker ◽  
...  
Keyword(s):  
South America ◽  
Tree Species ◽  
Tropical South America

scholarly journals Current and historical climate signatures to deconstructed tree species richness pattern in South America

2013 ◽  
Vol 35 (2) ◽  
pp. 219-231 ◽  
Author(s):  
Matheus de Souza Lima-Ribeiro ◽  
Frederico Valtuille Faleiro ◽  
Daniel Paiva Silva
Keyword(s):  
Species Richness ◽  
South America ◽  
Tree Species ◽  
Historical Climate ◽  
Tree Species Richness ◽  
Richness Pattern
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