scholarly journals Local and regional scale habitat heterogeneity contribute to genetic adaptation in a commercially important marine mollusc ( Haliotis rubra ) from southeastern Australia

2019 ◽  
Vol 28 (12) ◽  
pp. 3053-3072 ◽  
Author(s):  
Adam D. Miller ◽  
Ary A. Hoffmann ◽  
Mun Hua Tan ◽  
Mary Young ◽  
Collin Ahrens ◽  
...  
Keyword(s):  
Habitat Heterogeneity ◽  
Regional Scale ◽  
Genetic Adaptation ◽  
Marine Mollusc ◽  
Southeastern Australia ◽  
Commercially Important ◽  
Haliotis Rubra

Modelling bark volume for six commercially important tree species in France: assessment of models and application at regional scale

2021 ◽  
Vol 78 (4) ◽  
Author(s):  
Rodolphe Bauer ◽  
Antoine Billard ◽  
Frédéric Mothe ◽  
Fleur Longuetaud ◽  
Mojtaba Houballah ◽  
...  
Keyword(s):  
Tree Species ◽  
Regional Scale ◽  
Commercially Important

Possible impacts of zoosporic parasites in diseases of commercially important marine mollusc species: part I. Perkinsozoa

2017 ◽  
Vol 60 (4) ◽  
Author(s):  
Frank H. Gleason ◽  
Osu Lilje ◽  
Cecile Dang ◽  
Sabrina Geraci-Yee ◽  
Jackie L. Collier
Keyword(s):  
Important Species ◽  
Marine Mollusc ◽  
Mollusc Species ◽  
Commercially Important

AbstractThe phylum Perkinsozoa includes well-known parasites of commercially important species of molluscs in aquaculture, such as

Habitat heterogeneity as a local and regional-scale driver of primate assemblage structure in northernmost Brazilian Amazonia

2017 ◽  
Vol 67 (3-4) ◽  
pp. 263-286
Author(s):  
José Ramon Gadelha ◽  
Éverton Renan de Andrade Melo ◽  
Maria Nazaré Domingos da Silva ◽  
Antonio Paulo da Silva Júnior ◽  
Bruno Karol Cordeiro Filgueiras ◽  
...  
Keyword(s):  
Habitat Heterogeneity ◽  
Local Level ◽  
Regional Scale ◽  
Primate Species ◽  
Line Transect ◽  
Human Settlement ◽  
Human Settlements ◽  
Ateles Paniscus ◽  
Sapajus Apella ◽  
Habitat Generalist

We performed line transect surveys in two fishbone human settlements (defined as clearings cut through forests in a fishbone pattern, extending along secondary roads from a main road) in different vegetation types, as well as in one protected area. A total of 410 sightings of eight primate species were recorded in the three study areas. The mean total primate abundance was 3.28 groups/10 km walked, and there were significant differences between areas with different plant physiognomies. The abundance of the larger primate speciesAlouatta macconnelliandAteles paniscus(Atelidae) was higher in the dense ombrophilous forests of the Entre Rios human settlement, whereas those of all the other species were higher in the forest mosaics of the Novo Paraíso human settlement and Viruá National Park. The habitat generalistSapajus apellapresented the highest abundances in all the areas. No significant differences were detected in relative biomass between study areas. Additionally, no significant differences were detected in the overall abundances or relative biomasses of the hunted species (Sapajus apella,Alouatta macconnelli,Ateles paniscus, andChiropotes chiropotes) between study areas. Human impact has been recognized as shaping primate assemblages. However, in this study, primates were not part of the dietary repertoire of the non-Amazonian immigrants inhabiting the fishbone human settlements. Thus, although the primate assemblages varied considerably at the regional and local level, they were shaped by habitat heterogeneity, which allowed the competing species to coexist through habitat segregation.

Estimating population size of the Black-eared Miner, with an assessment of landscape-scale habitat requirements

2005 ◽  
Vol 11 (3) ◽  
pp. 174 ◽  
Author(s):  
Rohan H. Clarke ◽  
Rebecca L. Boulton ◽  
Michael F. Clarke
Keyword(s):  
Population Size ◽  
Large Scale ◽  
Quantitative Methods ◽  
Habitat Degradation ◽  
Regional Scale ◽  
Distance Sampling ◽  
Biosphere Reserve ◽  
Habitat Requirements ◽  
Effective Population ◽  
Southeastern Australia

The decline of the Black-eared Miner Manorina melanotis has been caused primarily by habitat degradation and vegetation clearance. To better direct conservation actions for this species there was a need to assess habitat requirements on a regional-scale and to estimate the population size using quantitative methods. We used vegetation mapping and the current distribution of the Black-eared Miner to determine regional-scale habitat requirements. These findings were combined with the results of distance sampling to provide population estimates. The species is restricted to large tracts of intact mallee in the Murray Mallee of southeastern Australia that have not been burnt for at least 45 years. The density of Black-eared Miners is highest in areas that are dominated by mallee-Triodia associations and have not been intensively grazed. The Bookmark Biosphere Reserve supports an estimated 501 (270-927, 95% CI) colonies, containing 3 758 (2 026-6 954) phenotypically pure Black-eared Miners, 2 255 (1 215-4 170) hybrids and small numbers of Yellow-throated Miners Manorina flavigula. However, the effective population size is considerably smaller (390 Black-eared Miners (210-726) and 234 hybrids (126-433)). due to a skewed adult sex ratio (1 female: 1.81 males) and complex social organization. A smaller population also persists in the Murray Sunset National Park containing 53 (32-85) Black-eared Miner/hybrid colonies. Both populations face a high risk of extinction from large-scale wildfire. The endangered status of the species under IUCN criteria remains warranted.

The ark was full! Constant to declining Cenozoic shallow marine biodiversity on an isolated midlatitude continent

Paleobiology ◽  
2006 ◽  
Vol 32 (4) ◽  
pp. 509-532 ◽  
Author(s):  
James S. Crampton ◽  
Alan G. Beu ◽  
Roger A. Cooper ◽  
Craig M. Jones ◽  
Iain Matcham ◽  
...  
Keyword(s):  
Regional Scale ◽  
Sampling Bias ◽  
Marine Biodiversity ◽  
Taxonomic Rank ◽  
Tropical Regions ◽  
Shallow Marine ◽  
Marine Mollusc ◽  
The Past ◽  
The Rich ◽  
Taxonomic Groups

In recent years several authors have questioned the reality of a widely accepted and apparently large increase in marine biodiversity through the Cenozoic. Here we use collection-level occurrence data from the rich and uniquely well documented New Zealand (NZ) shelfal marine mollusc fauna to test this question at a regional scale. Because the NZ data were generated by a small number of workers and have been databased over many decades, we have been able to either avoid or quantify many of the biases inherent in analyses of past biodiversity. In particular, our major conclusions are robust to several potential taphonomic and systematic biases and methodological uncertainties, namely non-uniform loss of aragonitic faunas, biostratigraphic range errors, taxonomic errors, choice of time bins, choice of analytical protocols, and taxonomic rank of analysis.The number of taxa sampled increases through the Cenozoic. Once diversity estimates are standardized for sampling biases, however, we see no evidence for an increase in marine mollusc diversity in the NZ region through the middle and late Cenozoic. Instead, diversity has been approximately constant for much of the past 40 Myr and, at the species and genus levels, has declined over the past ~5 Myr. Assuming that the result for NZ shelfal molluscs is representative of other taxonomic groups and other temperate faunal provinces, then this suggests that the postulated global increase in diversity is either an artifact of sampling bias or analytical methods, resulted from increasing provinciality, or was driven by large increases in diversity in tropical regions. We see no evidence for a species-area effect on diversity. Likewise, we are unable to demonstrate a relationship between marine temperature and diversity, although this question should be re-examined once refined shallow marine temperature estimates become available.

Sign in / Sign up

Export Citation Format

Share Document