Species richness and phylogenetic diversity of different growth forms of angiosperms across a biodiversity hotspot in the horn of Africa

2020 ◽  
Author(s):  
Ya‐Dong Zhou ◽  
Biyansa Hirpo Boru ◽  
Sheng‐Wei Wang ◽  
Qing‐Feng Wang
Keyword(s):  
Species Richness ◽  
Phylogenetic Diversity ◽  
Biodiversity Hotspot ◽  
Growth Forms ◽  
Horn Of Africa

Palm house – biodiversity hotspot or risk of invasion? Aquatic invertebrates: The special case of Monogononta (Rotifera) under greenhouse conditions

Biologia ◽  
2015 ◽  
Vol 70 (1) ◽  
Author(s):  
Małgorzata Kolicka ◽  
Marcin Krzysztof Dziuba ◽  
Krzysztof Zawierucha ◽  
Natalia Kuczyńska–Kippen ◽  
Lech Kotwicki
Keyword(s):  
Species Richness ◽  
New Species ◽  
Aquatic Plants ◽  
Aquatic Invertebrates ◽  
Biodiversity Hotspot ◽  
Simpson Index ◽  
Mesocyclops Leuckarti ◽  
Euchlanis Dilatata ◽  
Special Case ◽  
Stable Populations

AbstractGreenhouses form favourable conditions for establishing stable populations of native as well as invasive alien microinvertebrates. Investigations of palm houses have a long tradition and native, alien and new species for science have been found in many of them. The examined pond and some microreservoirs in Bromeliaceae and Agavoideae in Pozna´n Palm House (Poland) sampled in 2012, appeared to contain representatives of Rotifera (64 species), Copepoda (2 species), Polychaeta, Acari and Insecta larvae. The most abundant Rotifera species were: Anuraeopsis fissa Gosse, 1851, Ascomorpha ecaudis Perty 1850, Euchlanis dilatata Ehrenberg, 1832, Pompholyx sulcata Hudson, 1885 and Trichocerca rousseleti Voight, 1902. Moreover, rotifers considered to be rare in Poland, i.e., Asplanchna herricki De Guerne, 1888, Collotheca pelagica Rousselet, 1893, Colurella sulcata Stenroos, 1898, Gastropus minor Rousselet, 1892 were also detected in Pozna´n Palm House. Two recorded Copepoda species were Phyllognathopus viguieri (Maupas, 1892) found in agave microreservoirs and Mesocyclops leuckarti (Claus, 1857) found in reservoir with aquatic plants. For biodiversity evaluation of rotifers Margalef’s and Shannon-Wiener’s indexes were used and in order to determine species richness the Simpson index was calculated. Additionally, a complete list of all aquatic invertebrates is presented, i.e., Plathelmintes (11 species), Nemeretea (2 species), Oligochatea (13 taxa), Polychaeta (7 species), Gastrotricha (13 taxa) and Copepoda (1 species) previously recorded in Pozna´n Palm House. To sum up, Palm houses create a convenient habitat for a prevalence of native and introduced invertebrates and are a putative source of alien species, possibly facilitating their release to the environment.

scholarly journals Flower‐visitor communities of an arcto‐alpine plant—Global patterns in species richness, phylogenetic diversity and ecological functioning

2018 ◽  
Vol 28 (2) ◽  
pp. 318-335 ◽  
Author(s):  
Mikko Tiusanen ◽  
Tea Huotari ◽  
Paul D. N. Hebert ◽  
Tommi Andersson ◽  
Ashley Asmus ◽  
...  
Keyword(s):  
Species Richness ◽  
Phylogenetic Diversity ◽  
Alpine Plant ◽  
Flower Visitor ◽  
Global Patterns ◽  
Ecological Functioning

scholarly journals The use of Shanon Weiners diversity index in the assessment of floral diversity and equitability of Neni–Nimo Watershed in Anaocha L.G.A. of Anambra State, Nigeria

2021 ◽  
Vol 16 (2) ◽  
pp. 155-158
Author(s):  
Ezenwatah Ifeoma Susan ◽  
Ukpaka Chukwujekwu Gratius ◽  
Onyemeka Regland Michael ◽  
Afulukwe Stella Chinyere ◽  
Okoye Elochukwu Chidubem Sunday
Keyword(s):  
Species Richness ◽  
Plant Growth ◽  
Diversity Index ◽  
Block Design ◽  
Species Abundance ◽  
P Value ◽  
Growth Forms ◽  
Anambra State ◽  
Floral Diversity ◽  
Current Usage

The study on the floral diversity of Neni-Nimo watershed in Anaocha L.G.A. of Anambra State was conducted between November 2009 and July 2020. The aim of the study was to find out the species richness and the floral biodiversity of the watershed. In this study, the watershed was divided into three sites, the forested site, the fallow site and the current usage site. The experiment was laid out in a Randomized Complete Block Design. The ecological methods used in this study are the Point Centred Plotless Count sampling technique for areas dominated by trees while the Plot Count technique using quadrats were used for sampling the areas dominated by forbs, shrubs, climbers and grasses. The vegetation data collected was used to estimate the species richness of the different plant growth forms, the diversity and equitability of the various growth forms encountered were calculated using Shanon Weiners diversity index. The Shanno Weiners diversity index shows that the forested areas had the highest floral biodiversity than the fallow and current usage area. Regression analysis shows that a significant relationship exists between species abundance and floral biodiversity at a p-value of <0.05 for all plant growth forms in the watershed except for grasses and as abundance increases, diversity also increases.

scholarly journals Increases in local richness (α-diversity) following invasion are offset by biotic homogenization in a biodiversity hotspot

2019 ◽  
Vol 15 (5) ◽  
pp. 20190133 ◽  
Author(s):  
Alessandra R. Kortz ◽  
Anne E. Magurran
Keyword(s):  
Invasive Species ◽  
Species Richness ◽  
Biodiversity Hotspot ◽  
Contemporary World ◽  
Local Species Richness ◽  
Β Diversity ◽  
Α Diversity ◽  
Local Species ◽  
Biodiversity Change ◽  
Null Expectation

The world's ecosystems are experiencing unparalleled rates of biodiversity change, with invasive species implicated as one of the drivers that restructure local assemblages. Here we focus on the processes leading to biodiversity change in a biodiversity hotspot, the Brazilian Cerrado. The null expectation that invasion leads to increase in local species richness is supported by our investigation of the grass layer in two key habitats (campo sujo and campo úmido). Our analysis uncovered a linear relationship between total richness and invasive richness at the plot level. However, because the invasive species—even though few in number—are widespread, their contribution to local richness (α-diversity) is offset by their homogenizing influence on composition (β-diversity). We thus identify a mechanism that can help explain the paradox that species richness is not declining in many local assemblages, yet compositional change is exceeding the predictions of ecological theory. As such, our results emphasize the importance of quantifying both α-diversity and β-diversity in assessments of biodiversity change in the contemporary world.

Beefing Up Species Richness? The Effect of Land-Use on Mammal Diversity in an Arid Biodiversity Hotspot

2015 ◽  
Vol 45 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Gareth K.H. Mann ◽  
Juliette V. Lagesse ◽  
M. Justin O'Riain ◽  
Dan M. Parker
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Biodiversity Hotspot ◽  
Mammal Diversity

Metabolic asymmetry and the global diversity of marine predators

Science ◽  
2019 ◽  
Vol 363 (6425) ◽  
pp. eaat4220 ◽  
Author(s):  
John M. Grady ◽  
Brian S. Maitner ◽  
Ara S. Winter ◽  
Kristin Kaschner ◽  
Derek P. Tittensor ◽  
...  
Keyword(s):  
Species Richness ◽  
Spatial Patterns ◽  
Marine Mammals ◽  
Phylogenetic Diversity ◽  
Latitudinal Gradient ◽  
Latitudinal Gradients ◽  
Competitive Interactions ◽  
Marine Predators ◽  
Theoretical Predictions ◽  
The Tropics

Species richness of marine mammals and birds is highest in cold, temperate seas—a conspicuous exception to the general latitudinal gradient of decreasing diversity from the tropics to the poles. We compiled a comprehensive dataset for 998 species of sharks, fish, reptiles, mammals, and birds to identify and quantify inverse latitudinal gradients in diversity, and derived a theory to explain these patterns. We found that richness, phylogenetic diversity, and abundance of marine predators diverge systematically with thermoregulatory strategy and water temperature, reflecting metabolic differences between endotherms and ectotherms that drive trophic and competitive interactions. Spatial patterns of foraging support theoretical predictions, with total prey consumption by mammals increasing by a factor of 80 from the equator to the poles after controlling for productivity.

The moss flora of the Auckland Islands, New Zealand, with a consideration of habitats, origins, and adaptations

1979 ◽  
Vol 57 (20) ◽  
pp. 2226-2263 ◽  
Author(s):  
Dale H. Vitt
Keyword(s):  
Species Richness ◽  
New Zealand ◽  
Polar Regions ◽  
Growth Forms ◽  
Common Pattern ◽  
Moss Species ◽  
Tussock Grassland ◽  
History Of

The moss flora of the Auckland Islands (50°40′ S latitude and 166°00′ E longitude) consists of 145 species and seven varieties in 75 genera. A detailed description of the habitat of each taxon is given. The vegetation, climate, and history of the islands, as they pertain to bryology, are reviewed. Four broad vegetational zones are recognized: forest, scrub, tussock grassland, and tundra as well as areas of herbfields and mires. Phytogeographically, the most common pattern of distribution is Australasian with 29% of the moss species found in both New Zealand and Australia. Other patterns are common as well. Discussion is orientated toward species richness variability in polar regions. The origins and adaptations of mosses in subantarctic landscapes are reviewed and correlations drawn between particular growth forms and individual moss floras and habitats.

Assessing the vulnerability of species richness to anthropogenic climate change in a biodiversity hotspot

2002 ◽  
Vol 11 (6) ◽  
pp. 445-451 ◽  
Author(s):  
G.F. Midgley ◽  
L. Hannah ◽  
D. Millar ◽  
M.C. Rutherford ◽  
L.W. Powrie
Keyword(s):  
Climate Change ◽  
Species Richness ◽  
Biodiversity Hotspot ◽  
Anthropogenic Climate Change
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