NDLI: Geographical patterns of old and young species in African forest biota: the significance of specific montane areas as evolutionary centres

Content Provider	Springer Nature Link
Author	Fjeldsaå, Jon Lovett, Jon C.
Copyright Year	1997
Abstract	A widely accepted paradigm for speciation in tropical forests, the refuge theory, requires periodic habitat fragmentation driven by global climatic fluctuations to provide conditions for allopatric speciation. This implies that comparative species richness in refugia is due to loss of diverse communities in areas affected by climatic cycles. In this study we compare distribution patterns of bird and plant taxa which we consider to be of either deep phylogenetic lineages or recent radiations. It is demonstrated that lowland areas which have been postulated as Pleistocene refugia are dominated by species which represent lineages of pre-Pleistocene age. Since variations in species richness within these forest tracts reflect currently apparent environmental variables which might be considered to determine carrying capacity, we do not need to postulate that richness is the result of changes in forest cover in the past. Recently diversified taxa of plants and birds are found mainly at the periphery of the main rain forest blocks and in habitat islands outside them. Here, peak concentrations of young restricted-range species are often congruent with clusters of old and biogeographically relictual species. It is suggested that this reflects special intrinsic environmental properties of these areas, in the form of long-term environmental stability caused mainly by persistent orographic rain or mist. In this case, richness is not necessarily due to extinction outside these areas. Stability not only enables survival of relictual taxa, but also promotes morphological differentiation of radiating taxa, leading to aggregates of taxa of restricted distribution.
Starting Page	325
Ending Page	346
Page Count	22
File Format	PDF
ISSN	09603115
Journal	Biodiversity and Conservation
Volume Number	6
Issue Number	3
e-ISSN	15729710
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Evolutionary Biology Tree Biology Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics Nature and Landscape Conservation

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Species richness, species range size and ecological specialisation among African primates: geographical patterns and conservation implications

Tree species richness complementarity, disturbance and fragmentation in a Mexican tropical montane cloud forest

Tree species richness in primary and old secondary tropical forest in Singapore

How resilient are Andean montane forest bird communities to habitat degradation?

Post-cultivation Secondary Succession in a Venezuelan Lower Montane Rain Forest

Fern richness, tree species surrogacy, and fragment complementarity in a Mexican tropical montane cloud forest

Comparison of Bird Communities in Primary vs. Young Secondary Tropical Montane Cloud Forest in Guatemala

Patterns of plant species endemism in Ecuador

Species Composition, Physiognomy and Plant Diversity of the Tropical Montane Evergreen Broad-leaved Forest in Southern Yunnan

Geographical patterns of old and young species in African forest biota: the significance of specific montane areas as evolutionary centres

Similar Documents

Species richness, species range size and ecological specialisation among African primates: geographical patterns and conservation implications

Tree species richness complementarity, disturbance and fragmentation in a Mexican tropical montane cloud forest

Tree species richness in primary and old secondary tropical forest in Singapore

How resilient are Andean montane forest bird communities to habitat degradation?

Post-cultivation Secondary Succession in a Venezuelan Lower Montane Rain Forest

Fern richness, tree species surrogacy, and fragment complementarity in a Mexican tropical montane cloud forest

Comparison of Bird Communities in Primary vs. Young Secondary Tropical Montane Cloud Forest in Guatemala

Patterns of plant species endemism in Ecuador

Species Composition, Physiognomy and Plant Diversity of the Tropical Montane Evergreen Broad-leaved Forest in Southern Yunnan

Geographical patterns of old and young species in African forest biota: the significance of specific montane areas as evolutionary centres