scholarly journals Species Richness and Diversity of Resident and Migratory Landbirds in Remnant Forest Patches and Residential Areas in the Florida Keys, USA

2011 ◽  
Vol 2011 ◽  
pp. 1-12
Author(s):  
Martin B. Main ◽  
Mary C. Christman ◽  
Annisa Karim ◽  
Mark Hostetler
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Migratory Birds ◽  
Forest Type ◽  
Florida Keys ◽  
Percent Cover ◽  
Residential Areas ◽  
Resident Species ◽  
Species Of Conservation Concern ◽  
Conservation Concern

Conservation of migratory birds necessitates protecting suitable stopover habitat along migratory routes as well as destination habitats, especially near large geographic barriers such as the Gulf of Mexico. The Florida Keys (Keys) are an important stopover and breeding destination for migratory landbirds. We documented 47 migratory and 21 resident landbird species via point counts during March–May 2004 and 2005. As a group, species richness, species diversity, and the effective number of species of migratory landbirds, including several species of conservation concern, was significantly and positively associated with percent cover of tropical hardwood hammock, a threatened upland forest type. The collective resident landbird community in the Keys was negatively associated with native hammock cover, although species diversity of the resident community was positively associated with the proximity of native hammock and several resident species, including species of conservation concern, were commonly or predominantly associated with native hammock. Consequently, conservation of native hammock habitat in the Keys is an important conservation priority for migratory birds and several resident species of conservation concern.

scholarly journals Epixylic vegetation abundance, diversity, and composition vary with coarse woody debris decay class and substrate species in boreal forest

2018 ◽  
Vol 48 (4) ◽  
pp. 399-411 ◽  
Author(s):  
Praveen Kumar ◽  
Han Y.H. Chen ◽  
Sean C. Thomas ◽  
Chander Shahi
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Boreal Forest ◽  
Plant Communities ◽  
Coarse Woody Debris ◽  
Woody Debris ◽  
Percent Cover ◽  
Diverse Range ◽  
Decay Class ◽  
Wide Range

Although the importance of coarse woody debris (CWD) to understory species diversity has been recognized, the combined effects of CWD decay and substrate species on abundance and species diversity of epixylic vegetation have received little attention. We sampled a wide range of CWD substrate species and decay classes, as well as forest floors in fire-origin boreal forest stands. Percent cover, species richness, and evenness of epixylic vegetation differed significantly with both CWD decay class and substrate species. Trends in cover, species richness, and evenness differed significantly between nonvascular and vascular taxa. Cover, species richness, and species evenness of nonvascular species were higher on CWD, whereas those of vascular plants were higher on the forest floor. Epixylic species composition also varied significantly with stand ages, overstory compositions, decay classes, substrate species, and their interactions. Our findings highlight strong interactive influences of decay class and substrate species on epixylic plant communities and suggest that conservation of epixylic diversity would require forest managers to maintain a diverse range of CWD decay classes and substrate species. Because stand development and overstory compositions influence CWD decay classes and substrate species, as well as colonization time and environmental conditions in the understory, our results indicate that managed boreal landscapes should consist of a mosaic of different successional stages and a broad suite of overstory types to support diverse understory plant communities.

scholarly journals Assessing Ecological Risks from Atmospheric Deposition of Nitrogen and Sulfur to US Forests Using Epiphytic Macrolichens

Diversity ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 87 ◽  
Author(s):  
Linda H. Geiser ◽  
Peter R. Nelson ◽  
Sarah E. Jovan ◽  
Heather T. Root ◽  
Christopher M. Clark
Keyword(s):  
Species Richness ◽  
Atmospheric Deposition ◽  
Ecological Risk ◽  
Critical Loads ◽  
Climate Data ◽  
Species Of Conservation Concern ◽  
Total Species Richness ◽  
Conservation Concern ◽  
Species Richness And Abundance ◽  
Total Species

Critical loads of atmospheric deposition help decision-makers identify levels of air pollution harmful to ecosystem components. But when critical loads are exceeded, how can the accompanying ecological risk be quantified? We use a 90% quantile regression to model relationships between nitrogen and sulfur deposition and epiphytic macrolichens, focusing on responses of concern to managers of US forests: Species richness and abundance and diversity of functional groups with integral ecological roles. Analyses utilized national-scale lichen survey data, sensitivity ratings, and modeled deposition and climate data. We propose 20, 50, and 80% declines in these responses as cut-offs for low, moderate, and high ecological risk from deposition. Critical loads (low risk cut-off) for total species richness, sensitive species richness, forage lichen abundance and cyanolichen abundance, respectively, were 3.5, 3.1, 1.9, and 1.3 kg N and 6.0, 2.5, 2.6, and 2.3 kg S ha−1 yr−1. High environmental risk (80% decline), excluding total species richness, occurred at 14.8, 10.4, and 6.6 kg N and 14.1, 13, and 11 kg S ha−1 yr−1. These risks were further characterized in relation to geography, species of conservation concern, number of species affected, recovery timeframes, climate, and effects on interdependent biota, nutrient cycling, and ecosystem services.

scholarly journals Waders (Aves, Charadriiformes) in a Mediterranean remnant wetland: a year-round pilot study evidences contrasting patterns in diversity metrics

2015 ◽  
Vol 85 (1) ◽  
pp. 61
Author(s):  
Corrado Battisti ◽  
Aldo Boano ◽  
Michele Cento ◽  
Amedeo Circosta ◽  
Sergio Muratore
Keyword(s):  
Species Richness ◽  
Species Turnover ◽  
Total Abundance ◽  
Species Richness And Diversity ◽  
Species Of Conservation Concern ◽  
Complementary Pattern ◽  
Vanellus Vanellus ◽  
High Dominance ◽  
Conservation Concern ◽  
Diversity Metrics

Around a yearly cycle (August 2011 - July 2012), we studied the assemblages of waders (Aves Charadriiformes) occurring in a Mediterranean remnant wetland, obtaining a set of diversity metrics. Mean total abundance shows a complementary pattern when compared to species richness and diversity: the highest values of mean total abundance were observed in December-January, due to high dominance of only one very abundant and gregarious species (the lapwing Vanellus vanellus). On the contrary, in this period, species richness and diversity showed the lowest values. These last metrics were highest in values during the April-September period when a large number of species of conservation concern utilize muddy areas as trophic and stop-over sites, due to the seasonal water stress. The highest values in species turnover index were observed between December-January and February-March when passage migrants (high richness, low abundance) substitute the wintering species (low richness, high abundance). Our data highlight that, in Mediterranean remnant wetlands, strategies should be addressed to increase the muddy suitable areas in the April-September period in order to maximize species richness and diversity. In fact, in these months these habitats host pre- and post-breeding migrant waders of conservation concern.

scholarly journals Insect Diversity of the Muni-Pomadze Ramsar Site: An Important Site for Biodiversity Conservation in Ghana

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Rosina Kyerematen ◽  
Daniel Acquah-Lamptey ◽  
Erasmus Henaku Owusu ◽  
Roger Sigismund Anderson ◽  
Yaa Ntiamoa-Baidu
Keyword(s):  
Species Richness ◽  
Diversity Index ◽  
Community Diversity ◽  
Butterfly Species ◽  
Ramsar Site ◽  
Entire Study ◽  
Good Shape ◽  
Species Of Conservation Concern ◽  
Large Numbers ◽  
Conservation Concern

An inventory of species diversity of insects of the Muni-Pomadze Ramsar site, with special reference to species of conservation concern, was carried out as part of an evaluation of changes in the ecological character of the site, twenty years after designation. Samples were taken from two protected areas within the Ramsar site, in the wet (July), dry (January), and intermediate (June) seasons. Community diversity was characterized in terms of number of species accumulated, species richness, Shannon-Weiner indices of diversity, Pielou’s evenness, and Bray-Curtis similarity. A total of 134 families from 19 insect orders were recorded during the entire study period. Yenku Block A recorded the highest species richness (98) and the highest diversity index (14.97), corroborated by the highest Margalef index of 3.82 with a relatively even distribution of species (0.834) during the intermediate season, and recorded the lowest diversity (6.957) and species richness (41) during the dry season. On the whole, the Muni-Pomadzi Ramsar site showed a high diversity of insect species. The presence of species such as Junonia oenone and Papilio demodocus which are specialized in degraded habitats at Yenku Block A in large numbers is a clear indication of degradation of the forest, but the presence of forest species such as Salamis anacardii and Euphaedra crokeri is an indication that some parts of this reserve are still in good shape. A comparison of the butterfly species recorded with findings in a 1997 survey showed a marked increase in numbers from 75 to 130; this may be attributed to the habitat changes that have taken place at the site offering more diverse habitat types.

scholarly journals An appraisal of avian species diversity in and around Purulia Town, West Bengal, India

2021 ◽  
Vol 13 (3) ◽  
pp. 17906-17917
Author(s):  
Swastik Mahato ◽  
Sudipta Mandal ◽  
Dipanwita Das
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Systematic Study ◽  
Biological Diversity ◽  
West Bengal ◽  
Migratory Birds ◽  
Seasonal Abundance ◽  
Line Transect ◽  
Line Transect Method ◽  
Subsequent Identification

Purulia, the westernmost district of West Bengal, India is least explored with respect to the biological diversity and relatively little information is available to date.  The present study was conducted from February 2017 to January 2018 to document avifaunal diversity in Purulia Town and surroundings.  Sampling was done through the line transect method with photographic documentation and subsequent identification following suitable keys.  Species richness and seasonal abundance were calculated.  Altogether, 115 species of birds belonging to 19 orders and 43 families were recorded during the study period.  Passeriformes was the most dominant order represented by 46 species during the study.  The Shannon-Wiener (H’) value was highest for January (1.564).  A large number of migratory birds visit Purulia every year mostly during winter and it is reflected in the present study.  Diverse foraging habit among the birds was observed during the study period and omnivorous birds (29%) were found in highest number followed by invertivores (26%), carnivores (25%), granivores (8%), herbivores (7%), frugivores (3%), and nectarivores (2%).  The present study is a preliminary effort to document the avifaunal diversity of Purulia and a more extensive systematic study should be carried out to investigate and protect the avifaunal diversity of this region.

scholarly journals Bird species richness in High-Andean forest fragments: habitat quality and topography matter

2020 ◽  
Vol 150 ◽  
Author(s):  
Constance Fastré ◽  
Diederik Strubbe ◽  
José A. Balderrama ◽  
Jennifer R.A. Cahill ◽  
Hannes Ledegen ◽  
...  
Keyword(s):  
Species Richness ◽  
Habitat Quality ◽  
Bird Species ◽  
Bird Communities ◽  
Forest Fragments ◽  
Bird Species Richness ◽  
Species Of Conservation Concern ◽  
Forest Remnants ◽  
Exotic Plantations ◽  
Conservation Concern

Montane forests worldwide are known centers of endemism and biodiversity but are highly threatened by fragmentation processes. Using data collected in 15 Polylepis forest remnants covering 2000 hectares, we investigated how bird species richness and bird community composition, particularly for species of conservation concern, are influenced by habitat quality and topography in the Tunari National Park in the High Andes of Bolivia. Bird species richness was highest in topographically complex, low-elevation Polylepis patches located in areas with a high potential to retain rainwater. Bird communities differed strongly between Polylepis lanata and P. subtusalbida remnants, each supporting different threatened and endemic species. Within the P. subtusalbida forest, high-elevation fragments characterized by high amounts of sunlight and low anthropogenic disturbance were more likely to contain threatened species. Surprisingly, we found no effect of fragment size on the diversity or composition of bird communities or the presence of bird species of conservation concern. The presence of exotic plantations (Pinus and/or Eucalyptus spp.) in or outside forest remnants was negatively associated with the number of bird species as well as with occurrence of the endangered Cochabamba-mountain finch (Compsospiza garleppi). To support the different communities found in Polylepis forests, these results suggest that conservation efforts should be directed towards both forest types (P. subtusalbida and P. lanata) present in the area. For an efficient management of avian diversity, exotic plantations should be established away from native remnants while existing patches should be managed to maintain or increase habitat quality. Finally, the importance of local topography in determining avian species richness and community composition in forest fragments, mainly through topographic controls on moisture distribution and the amount of sunlight received by the fragments, should be considered when planning conservation and reforestation schemes.

scholarly journals Do Citizen Science Methods Identify Regions of High Avian Biodiversity?

Diversity ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 656
Author(s):  
Christopher J. Butler ◽  
Chad King ◽  
Dan L. Reinking
Keyword(s):  
Species Richness ◽  
Citizen Science ◽  
Bird Species ◽  
Mean Annual Temperature ◽  
Science Methods ◽  
Breeding Bird ◽  
Number Of Species ◽  
Species Of Conservation Concern ◽  
Avian Biodiversity ◽  
Conservation Concern

Citizen science may offer a way to improve our knowledge of the spatial distribution of biodiversity and endemism, as the data collected by this method can be integrated into existing data sources to provide a more robust understanding of broad scale patterns of species richness. We explored whether data collected by citizen scientists agree on identifying regions of high avian species richness in a well-studied state. We compiled and examined the number of bird species detected in each of the 77 counties of Oklahoma based on published range maps, museum collections, and by five citizen science methods: the USGS Breeding Bird Survey, the Oklahoma Breeding Bird Atlas, eBird, the Oklahoma Winter Bird Atlas, and National Audubon Society Christmas Bird Counts. We also quantified the number of species of conservation concern recorded by each method in each county. A total of 460 species were reported across the state, with the total number of species detected by each method ranging from 40% of this total (Winter Bird Atlas) to 94% of this total (eBird). In general, species totals were poorly correlated across methods, with only six of 21 combinations (28.6%) showing significant correlations. Total species numbers recorded in each county were correlated with human population density and county area, but not with mean annual temperature or precipitation. The total number of species of conservation concern was correlated with the total number of species detected, county area, and precipitation. Most of the citizen science methods examined in this study were not explicitly designed to identify regions of high biodiversity and so efforts to use these methods for this purpose should be employed only cautiously and with a thorough understanding of potential biases.

Climatic Variables Differentially Influence Neotropical Plant Species of Conservation Concern

2021 ◽  
pp. 1-16
Author(s):  
Pablo Antúnez ◽  
Christian Wehenkel ◽  
Collins Byobona Kukunda ◽  
José Ciro Hernández-Díaz
Keyword(s):  
Plant Species ◽  
Climatic Variables ◽  
Species Of Conservation Concern ◽  
Conservation Concern

Using impact assessment study designs for addressing impacts to species of conservation concern

2012 ◽  
Vol 36 (3) ◽  
pp. 450-456 ◽  
Author(s):  
Mike E. Marshall ◽  
Ashley M. Long ◽  
Shannon L. Farrell ◽  
Heather A. Mathewson ◽  
Michael L. Morrison ◽  
...  
Keyword(s):  
Impact Assessment ◽  
Impact Assessment Study ◽  
Assessment Study ◽  
Species Of Conservation Concern ◽  
Conservation Concern ◽  
Study Designs
Sign in / Sign up

Export Citation Format

Share Document