Search results
Results from the WOW.Com Content Network
For example, micro-allopatry, also known as macro-sympatry, is a condition where there are two populations whose ranges overlap completely, but contact between the species is prevented because they occupy completely different ecological niches (such as diurnal vs. nocturnal).
In the range of overlap, only brown males of F. hypoleuca exist and are thought to have evolved the brown plumage to prevent hybridization, [17] though there is also evidence indicating that such character displacement is explained by heterospecific competition for territory rather than reinforcement. [18]
A Centre of Endemism is an area in which the ranges of restricted-range species overlap, [1] or a localised area which has a high occurrence of endemics. [2] Centres of endemism may overlap with biodiversity hotspots which are biogeographic regions characterized both by high levels of plant endemism and by serious levels of habitat loss.
Allopatric speciation (from Ancient Greek ἄλλος (állos) 'other' and πατρίς (patrís) 'fatherland') – also referred to as geographic speciation, vicariant speciation, or its earlier name the dumbbell model [1]: 86 – is a mode of speciation that occurs when biological populations become geographically isolated from each other to an extent that prevents or interferes with gene flow.
Peripatric speciation is a mode of speciation in which a new species is formed from an isolated peripheral population. [1]: 105 Since peripatric speciation resembles allopatric speciation, in that populations are isolated and prevented from exchanging genes, it can often be difficult to distinguish between them, [2] and peripatric speciation may be considered one type or model of allopatric ...
The cause of zonation is complex, due to many possible interactions and overlapping species ranges. Careful measurements and statistical tests are required to prove the existence of discrete communities along an elevation gradient, as opposed to uncorrelated species ranges. [6]
It is native to Europe, found where the parent species' ranges overlap, and many artificial hybrid cultivars have also been created for the garden trade. [ 4 ] [ 5 ] Naturally‑occurring individuals (the false oxlips) tend to have yellow flowers, while a wide range of flower colors has been developed in the cultivars (the polyanthus primroses ...
The secretion by a plant of biochemicals which influence the growth and reproduction of nearby plants. allopatric Having geographically separate, non-overlapping ranges of distribution. [17] Contrast sympatric. alternate 1. (adj.) (of leaves or flower s) Borne singly at different levels along a stem, including spiralled parts. Contrast opposite. 2.