scholarly journals The impact of landuse and the relationship between NDVI on the bird species richness in Sukmajaya District, Depok

2021 ◽  
Vol 846 (1) ◽  
pp. 012004
Author(s):  
I B Debataraja ◽  
D H Pradana ◽  
N L Winarni
2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Ravi Jambhekar ◽  
Kulbhushansingh Suryawanshi ◽  
Harini Nagendra

Abstract Urbanization is one of the major causes of biodiversity loss worldwide. Some species are able to adapt to urbanization, whereas others perish. Studies on long-term effects of the impact of urbanization on species diversity and abundance patterns are especially lacking from tropical cities. We seek to assess the relationship between urbanization and species richness of lake-dependent birds in Bangalore, a tropical mega-city in Southern India. We specifically ask: (i) How is bird species richness related to the size of the lake? (ii) How is bird species richness in Bangalore’s lakes related to the degree of urbanization? We used data from 2014 to 2019, collected from eBird—an online database that collates information on bird observations globally. Both lake area and distance from the city centre are correlated to species richness, with larger lakes supporting more bird species. As distance from the city centre increased (i.e. urbanization decreases), bird richness increased. Overall, in the city of Bangalore, migratory birds have declined while many lake-dependent resident birds seem to be increasing over the past 5 years. We hypothesize that birds that roost and nest in trees appear to be increasing. To confirm this, further research taking a trait-based approach is required. Urbanization appears to have species-specific impacts on lake-dependent birds in this tropical city, with certain groups of birds faring better than others. This research adds to the significant paucity of studies of the impact of urbanization on biodiversity in the urban tropics.


2009 ◽  
Vol 36 (7) ◽  
pp. 581 ◽  
Author(s):  
Amelia J. Koch ◽  
Sarah A. Munks ◽  
Chris Spencer

Context. The retention of mature eucalypts in plantation areas is expected to have biodiversity benefits, especially for animals with specific requirements such as hollow-using species. Aims. The aim of the current study was to examine the degree to which retained trees embedded in young (≤3 years old) eucalypt plantation provide habitat for birds, whether as a perching/foraging resource for all bird species or as a potential shelter/breeding site for hollow-using species. Methods. We examined bird use of remnant trees in young eucalypt plantations at five sites in northern Tasmania. Four 20-min surveys were done on 214 trees (101 of these had visible hollows) over two breeding seasons (2007 and 2008). Bird activity at a hollow was recorded during all four surveys, whereas the number of bird species observed in a tree was only recorded during two surveys in the first breeding season. The relationship between both species richness and hollow use with site and tree variables was explored using hierarchical partitioning. Key results. Bird species richness at a tree was most strongly related to which of the five properties the tree was located on. This may be due to differences in soil fertility and/or the amount of forested area within and around the property. Birds were observed investigating 50 hollows on 36 trees. More than one hollow was used in 10 trees and hollow use was most strongly related to hollow abundance in a tree. High re-use of particular trees (n = 15) and hollows (n = 16) indicates that retained trees vary in the type and quality of habitat they provide for hollow-using birds. The most common hollow users observed were the common starling (Sturnus vulgaris) and the striated pardalote (Pardalotus striatus). Conclusions and implications. Retaining trees in plantation areas, particularly trees with special features such as hollows, should be encouraged to provide habitat for birds and help contribute to the maintenance of bird diversity in an area.


1995 ◽  
Vol 73 (12) ◽  
pp. 2231-2237 ◽  
Author(s):  
Nicholas F. G. Folkard ◽  
James N. M. Smith

Boreal plant communities are strongly nutrient limited, and the animals of the boreal forest may therefore experience bottom-up nutrient limitation. We conducted a 5-year experimental study of the impact of aerial nitrogen fertilization on birds of the boreal forest near Kluane Lake, southwestern Yukon, to test for such bottom-up effects. Specifically, we tested if avian abundance and species richness increased after fertilization. Variable circular-plot point counts were made to estimate bird numbers and species richness each summer from 1988 to 1992. Fertilization had no effect on abundance for the first two summers, but total abundances of the seven commonest passerine bird species increased by an average of 46% over the final 3 years. Fertilization had no effect on bird species richness. Population densities and species richness were both low at Kluane compared with patterns seen in temperate forest. Yellow-rumped warblers (Dendroica coronata), dark-eyed juncos (Junco hyemalis), and Swainson's thrushes (Catharus ustulatus) dominated the passerine community at Kluane. There was only moderate spatial and temporal variation in songbird numbers on control plots over the 5-year study period.


2019 ◽  
Vol 25 (9) ◽  
pp. 3045-3055 ◽  
Author(s):  
Dan E. Chamberlain ◽  
Dominic A. W. Henry ◽  
Chevonne Reynolds ◽  
Enrico Caprio ◽  
Arjun Amar

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Federico Morelli

Many studies have shown how intensification of farming is the main cause of loss biodiversity in these environments. During the last decades, agroecosystems in Europe have changed drastically, mainly due to mechanization of agriculture. In this work, species richness in bird communities was examined on a gradient of spatial heterogeneity of farmlands, in order to quantify its effects. Four categories of farmland spatial heterogeneity were defined, based on landscape and landuse parameters. The impact of features increasing the spatial heterogeneity was quantified comparing the similarity indexes between bird communities in several farmlands of Central Italy. The effects of environmental variables on bird richness were analyzed using GLM. The results highlighted that landscape features surrogates of high nature values (HNVs) of farmlands can increase more than 50% the bird species richness. The features more related to bird richness were hedgerows, scattered shrubs, uncultivated patches, and powerlines. The results confirm that the approach based on HNV for evaluating the farmlands is also suitable in order to study birds’ diversity. However, some species are more sensitive to heterogeneity, while other species occupy mainly homogeneous farmlands. As a consequence, different conservation methods must be considered for each farmland bird species.


2021 ◽  
Author(s):  
◽  
Joel Methorst

Nature and its constituents are known to affect human well-being in positive and negative ways. Nature can be beneficial for humans by providing, for instance, food, recreation or inspiration. Natural disasters or transmitted diseases are, on the other hand, examples of nature’s detrimental or harmful contributions to human well-being. Such positive as well as negative effects have been termed Nature’s Contributions to People (NCP) by the Intergovernmental Science-Policy Platform for Biodiversity and Ecosystem Services (IPBES) and can be categorized into three different types of contributions: regulating, material and non-material NCP. While regulating and material NCP have been studied extensively, research on the non-material NCP is less common in comparison, especially regarding non-material NCP of biodiversity and wildlife. This dissertation therefore aims at shedding light on the non-material links between biodiversity, wildlife and human well-being. The thesis presents the results of three individual research studies in three separate chapters (CH1, 2 & 3). In the first chapter (CH1) I conduct a systematic literature review on the non-material contributions of wildlife. Several previous reviews have published overviews on the non-material contributions of wildlife. However, only a few of these reviews examine both the positive and negative effects of wildlife in combination. These reviews usually cover few aspects of human well-being (e.g. recreation, health, psychological well-being) or just focus on a specific group of wildlife species (e.g. carnivores, scavengers). In addition, the pathways determining how wildlife affects human well-being are yet little understood. The aim of this review is therefore to create a holistic overview of the current knowledge on non-material contributions of wildlife (WCP), by summarising research on positive and negative effects and disentangling potential channels of human-wildlife experiences. My results show that most studies in scientific literature report negative WCP. However, over the last decade the number of publications on positive WCP has increased, mainly in the Global North. This change in research focus, at the turn of the century, may be related to the newly emerging ideas and perspectives on nature during that time (e.g. Ecosystem Services and NCP). The results may also indicate different research interests across global regions and a focus on positive WCP (especially in the Global North). Surprisingly, the review identifies a lack of joint systematic assessments of positive and negative WCP across taxa, human well-being dimensions and ways (channels) of wildlife experiences. Studies show taxon-specific differences, with predominantly positive WCP reported for birds and predominantly negative WCP published for mammals and reptiles. Physical health was the most examined human well-being dimension, while many others, such as subjective well-being, social well-being, learning, identity or sense of place were rarely studied in comparison. The two channels of wildlife experiences that have been mainly studied or reported are Interaction and Knowing. While Interaction describes multisensory experiences in which people physically interact with wildlife. Knowing describes the metaphysical connection between humans and wildlife that arises through thinking or remembering experiences from wildlife encounters (including knowledge about wildlife). To date, only few published studies examine the relationship between biodiversity and human well-being across larger spatial scales. For instance, little is known about how biodiversity is related to human well-being on the national or continental level. The second and third chapter (CH2 & 3) are thus comprised of two empirical case studies which examine the relationship between biodiversity and human well-being across Germany and Europe, respectively. As indicator for biodiversity, I use different species diversity measures including species richness and abundance. In the second chapter (CH2) I analyse the association between species richness and human health across Germany. The results demonstrate a significant positive relationship between plant and bird species richness and mental health while controlling for a multitude of socio-economic and demographic factors as well as other nature characteristics. In the third chapter (CH3) I conduct the first study on the relationship between species diversity and subjective well-being on the continental level. The results show that bird species richness (unlike mammal, megafauna and tree richness) is positively associated with life-satisfaction, a measure for subjective well-being across Europe. These results are robust while accounting for socio-economic and macro-economic factors. The results of both empirical studies are in correspondence with previous research, conducted on the local and national level. Overall, my dissertation shows that wildlife and biodiversity greatly affect human well-being and provide substantial non-material NCP. ...


2019 ◽  
Author(s):  
Federico Morelli ◽  
Yanina

ContextThe negative association between elevation and species richness is a well-recognized pattern in macro-ecology. ObjectivesThe aim of this study was to investigate changes in functional evenness of breeding bird communities along an elevation gradient in Europe. MethodsUsing the bird data from the EBCC Atlas of European Breeding Birds we estimated an index of functional evenness which can be assumed as a measure of the potential resilience of communities.ResultsOur findings confirm the existence of a negative association between elevation and bird species richness in all European eco regions. However, we also explored a novel aspect of this relationship, important for conservation: Our findings provide evidence at large spatial scale of a negative association between the functional evenness (potential community resilience) and elevation, independent of the eco region. We also found that the Natura2000 protected areas covers the territory most in need of protection, those characterized by bird communities with low potential resilience, in hilly and mountainous areas.ConclusionsThese results draw attention to European areas occupied by bird communities characterized by a potential lower capacity to respond to strong ecological changes, and, therefore, potentially more exposed to risks for conservation.


2021 ◽  
Vol 127 ◽  
pp. 107774
Author(s):  
Martina L. Hobi ◽  
Laura S. Farwell ◽  
Maxim Dubinin ◽  
Dmitrij Kolesov ◽  
Anna M. Pidgeon ◽  
...  

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