Vachellia caven in Southern South America

Description

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 860 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versions

The table below shows only published versions of the resource that are publicly accessible.

How to cite

Researchers should cite this work as follows:

Velasco N, Soto C (2020): Vachellia caven in Southern South America. v1.3. Laboratorio de Ecología Geográfica - Universidad de Chile. Dataset/Occurrence. http://gbif-chile.mma.gob.cl/ipt/resource?r=vachellia_caven&v=1.3

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Laboratorio de Ecología Geográfica - Universidad de Chile. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 703f7531-fd90-4b02-9303-c80c472f4a0a.  Laboratorio de Ecología Geográfica - Universidad de Chile publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Chile.

Keywords

Occurrence

Contacts

Geographic Coverage

A major portion of the distribution of Vachellia caven in South America

Temporal Coverage

Project Data

Disjunct distributions are patterns where populations of a species not distribute continuously in geography and are separated by a barrier. One typical and expected result of this discontinuity is that separate populations differentiate after time. These distributions form excellent biogeographic scenarios for studying ecological differentiation between populations. For instance, differentiation in morphological traits can represent an adaptation to new environments, while niche differentiation can be a consequence of access to areas previously restricted by dispersal limitation or competition. These kinds of changes are realised only after a long timespan since the disjunction and are primarily ecologically derived, while genetic differentiation is primarily the result of genetic drift produced shortly after the disruption. On the other hand, currently studies on ecological differentiation in disjunct populations have mostly focussed on attributes of the species, while differentiation in the ecological functioning of species has rarely been considered. Also, while it is known that the ecological function of a species may change depending on the local context (abiotic or biotic), so far no studies have evaluated how the ecological function of a species may change between regions along the entire (disjunct) distribution of a species. In this project, the focus will be on disjunct distributions and whether differentiation in ecological traits as morphology and niche relates to variation in the effects produced by populations in different regions. More specifically, we will evaluate the ecological differentiation (morphological, niche and function) of Acacia caven var. caven, a plant species with a disjunct distribution in the Southern Andes, with populations occurring in both Chile and Argentina on both sides of the mountain range.

The personnel involved in the project:

Sampling Methods

-For morphological studies, photos and physical samples were taken from 5 trees. These include 4 shoots (30 cm each) and 20 fruits with peduncle, per trees. Varieties were identified in lab and field, and vouchers were deposited in IBONE herbarium, and GEL. -For facilitation, trees were only georeferenced if they were higher than 3 m, and 2 m radius on the crown. Tress were distant at least 15 m between them in each population. -For niche study, the variety was recorded in field and the georeferences of the individual was taken.

Method step description:

1. For the morphological study were checked the descriptions provided in: Aronson, J. (1992). Evolutionary biology of Acacia caven (Leguminosae, Mimosoideae): infraspecific variation in fruit and seed characters. Annals of the Missouri Botanical Garden, 958-968. Pometti, C. L., Cialdella, A. M., Vilardi, J. C., & Saidman, B. O. (2007). Morphometric analysis of varieties of Acacia caven:(Leguminosae, Mimosoideae): Taxonomic inferences in the context of other Argentinean species. Plant Systematics and Evolution, 264(3-4), 239-249.

Additional Metadata