scholarly journals Spatiotemporal patterns in Golden-cheeked Warbler breeding habitat quality and quantity

2021 ◽  
Author(s):  
Lindsay Dreiss ◽  
Paul Sanchez-Navarro ◽  
Bryan Bird
Keyword(s):  
Protected Areas ◽  
Habitat Quality ◽  
Early Summer ◽  
Breeding Habitat ◽  
Conservation Action ◽  
Breeding Range ◽  
Habitat Conversion ◽  
Central Texas ◽  
Migratory Songbird ◽  
Generalized Metrics

The Golden-cheeked Warbler, Setophaga chrysoparia, is a migratory songbird listed as endangered under the federal Endangered Species Act that breeds exclusively in central Texas and is heavily impacted by habitat conversion. The species relies on mixed Ashe-juniper and oak woodlands for nest-building and shelter during spring and early summer months. Using land cover data spanning the last 25 years, we conducted a geospatial analysis to quantify changes and identify shifts in breeding habitat quantity and quality. Since 1985, 13% of all forests within the warbler's breeding range were disturbed, with greater incidences near San Antonio (32%) and Austin (24%) metropolitan areas. Additionally, there was a 45% decrease in high-quality habitat (i.e., intact mixed or evergreen core forests) and a decrease in patch size. Habitats within protected areas saw a less sharp decline in habitat quality and large increases in warbler sightings, but these only represent 10% of all highest-quality habitat in the breeding range. Drastic declines in habitat quality suggest that generalized metrics of conversion may underestimate true habitat loss as degradation may impact the ecological viability of remaining forests for warbler nesting. Further evidence suggests that the few protected areas within the Texas range continue to play a significant role in warbler breeding. This information will assist researchers and managers prioritizing conservation action and will inform upcoming species status determinations.

Characterising essential breeding habitat for whales informs the development of large-scale Marine Protected Areas in the South Pacific

2016 ◽  
Vol 548 ◽  
pp. 263-275 ◽  
Author(s):  
RE Lindsay ◽  
R Constantine ◽  
J Robbins ◽  
DK Mattila ◽  
A Tagarino ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Large Scale ◽  
South Pacific ◽  
Breeding Habitat ◽  
The South

scholarly journals Rapid declines in habitat quality and population size of the Liben (Sidamo) Lark Heteromirafra sidamoensis necessitate immediate conservation action – ERRATUM

2010 ◽  
Vol 20 (2) ◽  
pp. 214-214 ◽  
Author(s):  
PAUL F. DONALD ◽  
GRAEME M. BUCHANAN ◽  
NIGEL J. COLLAR ◽  
YILMA DELLELEGN ABEBE ◽  
MERID N. GABREMICHAEL ◽  
...  
Keyword(s):  
Population Size ◽  
Habitat Quality ◽  
Conservation Action

scholarly journals Spatial Assessment of the Potential Impact of Infrastructure Development on Biodiversity Conservation in Lowland Nepal

2018 ◽  
Vol 7 (9) ◽  
pp. 365 ◽  
Author(s):  
Roshan Sharma ◽  
Bhagawat Rimal ◽  
Nigel Stork ◽  
Himlal Baral ◽  
Maheshwar Dhakal
Keyword(s):  
Protected Areas ◽  
Habitat Quality ◽  
Infrastructure Development ◽  
Remotely Sensed Data ◽  
Buffer Zones ◽  
Ecological Sites ◽  
Key Species ◽  
Potential Impact ◽  
Anthropogenic Threats ◽  
The Impact

Biodiversity is declining at an unprecedented rate with infrastructure development being one of the leading causes. New infrastructure, such as roads, provides new access and results in increased land clearing and wildlife hunting. A number of large infrastructure projects, including new roads and rail, are being planned in Nepal. We show the application of readily available remotely sensed data and geospatial tools to assess the potential impact of these future developments on habitat quality under three protection-level scenarios. Our findings reveal that there is currently large spatial heterogeneity in habitat quality across the landscape as a result of current anthropogenic threats, and that three areas in particular could have up to 40% reduction in habitat quality as a result of the planned infrastructure. Further research is required to determine more precisely the impact on key species. Strengthening protected areas and buffer zones will contribute to mitigating degradation to some degree, however, large areas of biologically significant areas outside protected areas will be affected without new controls. Our geographic information systems (GIS) based methodology could be used to conduct studies in data poor developing countries, where rapid infrastructure development across ecological sites are ongoing, in order to make society, policy makers, and development planners aware.

Dynamic occupancy models reveal within-breeding season movement up a habitat quality gradient by a migratory songbird

Ecography ◽  
2008 ◽  
Vol 31 (5) ◽  
pp. 592-600 ◽  
Author(s):  
Matthew G. Betts ◽  
Nicholas L. Rodenhouse ◽  
T. Scott Sillett ◽  
Patrick J. Doran ◽  
Richard T. Holmes
Keyword(s):  
Breeding Season ◽  
Habitat Quality ◽  
Occupancy Models ◽  
Migratory Songbird

scholarly journals Estimating Changes in Habitat Quality through Land-Use Predictions: Case Study of Roe Deer (Capreolus pygargus tianschanicus) in Jeju Island

2020 ◽  
Vol 12 (23) ◽  
pp. 10123
Author(s):  
Dong-jin Lee ◽  
Seong Woo Jeon
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Protected Areas ◽  
Habitat Quality ◽  
Green Infrastructure ◽  
Roe Deer ◽  
Land Use Changes ◽  
Jeju Island ◽  
Invest Model ◽  
Integrated Valuation

This study predicts future land-use changes and the resulting changes in habitat quality, suggesting a method for establishing land-use management to ensure sustainable wildlife habitats. The conservation effects were verified in terms of wild animal habitat quality according to the designation of protected areas. Land-use change until 2050 was predicted using the Dyna-Conversion of Land Use Change and its effects (Dyna-CLUE) model for Jeju Island, Korea, and the change in the quality of roe deer habitats was predicted using the Integrated Valuation and Environmental Services and Tradeoffs (InVEST) model. Results indicate that, compared to 2030, urbanized area increased by 42.55 km2, farmland decreased by 81.36 km2, and natural area increased by 38.82 km2 by 2050. The average habitat quality on Jeju Island was predicted to decrease from 0.306 in 2030 to 0.303 in 2050. The average habitat quality ranged from 0.477 in 2030 to 0.476 in 2050 in protected areas and 0.281 in 2030 to 0.278 in 2050 outside protected areas. Habitat quality in protected areas was relatively high, and its reduction was limited. Areas with lower habitat quality need approaches such as expanding greenery and improving its quality. By establishing appropriate land-use plans by predicting habitat quality, wildlife habitats can be better maintained and protected, which is a primary goal of green infrastructure.

Optimal selection of marine protected areas based on connectivity and habitat quality

2012 ◽  
Vol 240 ◽  
pp. 105-112 ◽  
Author(s):  
Moa Berglund ◽  
Martin Nilsson Jacobi ◽  
Per R. Jonsson
Keyword(s):  
Protected Areas ◽  
Habitat Quality ◽  
Marine Protected Areas ◽  
Optimal Selection ◽  
Selection Of

scholarly journals Severe recent decrease of adult body mass in a declining insectivorous bird population

2014 ◽  
Vol 281 (1786) ◽  
pp. 20140649 ◽  
Author(s):  
Sébastien Rioux Paquette ◽  
Fanie Pelletier ◽  
Dany Garant ◽  
Marc Bélisle
Keyword(s):  
Body Mass ◽  
Habitat Quality ◽  
Bird Species ◽  
Migratory Bird ◽  
Breeding Habitat ◽  
Tree Swallow ◽  
Adult Body Mass ◽  
Agricultural Intensity ◽  
Carry Over ◽  
Substantial Decline

Migratory bird species that feed on air-borne insects are experiencing widespread regional declines, but these remain poorly understood. Agricultural intensification in the breeding range is often regarded as one of the main drivers of these declines. Here, we tested the hypothesis that body mass in breeding individuals should reflect habitat quality in an aerial insectivore, the tree swallow ( Tachycineta bicolor ), along a gradient of agricultural intensity. Our dataset was collected over 7 years (2005–2011) and included 2918 swallow captures and 1483 broods. Analyses revealed a substantial decline of the population over the course of the study (−19% occupancy rate), mirrored by decreasing body mass. This trend was especially severe in females, representing a total loss of 8% of their mass. Reproductive success was negatively influenced by intensive agriculture, but did not decrease over time. Interestingly, variation in body mass was independent of breeding habitat quality, leading us to suggest that this decline in body mass may result from carry-over effects from non-breeding areas and affect population dynamics through reduced survival. This work contributes to the growing body of evidence suggesting that declines in migratory aerial insectivores are driven by multiple, complex factors requiring better knowledge of year-round habitat use.

scholarly journals Heterospecific song quality as social information for settlement decisions: an experimental approach in a wild bird

2019 ◽  
Author(s):  
Jennifer Morinay ◽  
Jukka T. Forsman ◽  
Blandine Doligez
Keyword(s):  
Habitat Selection ◽  
Habitat Quality ◽  
Social Information ◽  
Great Tit ◽  
Social Cues ◽  
Breeding Habitat ◽  
Site Quality ◽  
Ficedula Albicollis ◽  
High Quality ◽  
Local Habitat

AbstractAssessing local habitat quality via social cues provided by con- or heterospecific individuals sharing the same needs is a widespread strategy of social information use for breeding habitat selection. However, gathering information about putative competitors may involve agonistic costs. The use of social cues reflecting local habitat quality acquired from a distance, such as acoustic cues, could therefore be favoured. Bird songs are conspicuous signals commonly assumed to reliably reflect producer quality, and thereby local site quality. Birds of different species have been shown to be attracted to breeding sites by heterospecific songs, but whether they can use fine heterospecific song features as information on producer (and by extension habitat) quality remains unknown. We used a playback experiment in a wild population of collared flycatchers (Ficedula albicollis), a species known to eavesdrop on dominant great tits’ (Parus major) presence and performance, to test whether flycatchers preferred to settle near broadcasts of a high quality great tit song (i.e. song with large repertoire size, long strophes, high song rate), a low quality great tit song or a chaffinch song (control). Among old females, aggressive ones preferred to settle near broadcasts of high quality tit song and avoided broadcasts of low quality tit song, while less aggressive females preferred to settle near broadcasts of low quality tit song. Male personality or age did not influence settlement decisions. Our results show that collared flycatcher females use great tit song quality features as information for settlement decisions, though differently depending on their own competitive ability and/or previous experience with great tit songs. Our study therefore further illustrates the complex condition-dependent use of heterospecific social information for breeding habitat selection.

scholarly journals Stakeholder perception on the Sea Turtle conservation in the Gili Matra Tourism Area, Lombok, West Nusa Tenggara

2020 ◽  
Vol 9 (2) ◽  
Author(s):  
Ahmad Jupri ◽  
Baiq Riyan Anggriani Putri ◽  
Hilman Ahyadi ◽  
Yuliadi Zamroni
Keyword(s):  
Habitat Quality ◽  
Technical Assistance ◽  
Local Community ◽  
Group Discussion ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Conservation Action ◽  
Turtle Conservation ◽  
Sea Turtle Conservation ◽  
Turtle Population

The conservation of sea turtles in a nature-based tourism area is significant to enhance sustainability of the sea turtle population in the wild. Small islands in Lombok Island chains, the Gili Matra, are one of the significant habitats for turtles, and the island is recognized as one of the islands with fastest tourism growth in Indonesia. The research aims to explore the stakeholders’ perspectives in sea turtle conservation in Gili Matra, Lombok. Focus group discussion was implemented to identify the stakeholder perspective. Literature survey was carried out to generate related data concerning sea turtle population and its habitat quality in Gili Matra. The result of this study indicates that stakeholders can identify three species of sea turtle in Gili Matra waters, namely the green sea turtle (Chelonia mydas), the Hawksbill Turtle (Eretmochelys imbricate), and the ridley sea turtle (Lepydochely olivacea). Stakeholders state that between 1990 and 2017, there was reduction in the population size in Gili Matra. Factors related to the decrease of population in Gili Matra include decrease of habitat quality and human activity. Some recommendations were made, including increasing socialization and campaign, providing tools and facility to support conservation action, controlling unsustainable practice of fish collection, strengthening the implementation of regulation, and providing training and technical assistance to the local community and local office.

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