scholarly journals Further Evidence that Development and Buffer Zones Do Little To Reduce Mosquito Nuisance from Neighboring Habitat

2020 ◽  
Vol 36 (3) ◽  
pp. 204-207
Author(s):  
Brian J. Johnson ◽  
Russell Manby ◽  
Gregor J. Devine
Keyword(s):  
Open Space ◽  
Open Water ◽  
Buffer Zone ◽  
Mitigation Strategies ◽  
Buffer Zones ◽  
Breeding Sites ◽  
Mosquito Abundance ◽  
Coastal Landscapes ◽  
High Level ◽  
Source Sink

ABSTRACT Little is known regarding the comparative source–sink relationships between primary mosquito breeding sites (source) and neighboring (sink) environments in heterogeneous landscapes. An exploration of those relationships may provide unique insights into the utility of open-space buffer zone mitigation strategies currently being considered by urban planners to reduce contact between mosquitoes and humans. We investigated the source–sink relationships between a highly productive mosquito habitat and adjacent residential (developed) and rural (undeveloped) coastal environments. Our results suggest that source–sink relationships are unaffected by environment. This conclusion is supported by the high level of synchronicity in daily saltmarsh mosquito abundance observed among all surveyed environments (β = 0.67–0.79, P < 0.001). This synchronicity occurred despite the uniqueness of each surveyed environment and the considerable distances of open water and land (2.2–2.6 km) between them. Trap catches, which we interpret as expected mosquito biting nuisance, were high in both residential and rural coastal landscapes (309.4 ± 52.84 and 405.3 ± 62.41 mosquitoes/day, respectively). These observations suggest that existing and planned open-space buffer zones will do little to reduce the biting burden caused by highly vagile saltmarsh mosquitoes. This strengthens the need for empirically informed planning guidelines that alert urban planners to the real risks of human residential encroachment on land that is close to highly vagile mosquito habitat.

scholarly journals Nest characteristics and populations of Tapanuli Orangutans in the conflict areas, Batangtoru Landscape, North Sumatra, Indonesia

2020 ◽  
Vol 21 (7) ◽  
Author(s):  
Wanda Kuswanda ◽  
R. HAMDANI HARAHAP ◽  
HADI S. ALIKODRA ◽  
ROBERT SIBARANI
Keyword(s):  
Tree Height ◽  
Buffer Zone ◽  
Mitigation Strategies ◽  
Line Transect ◽  
Buffer Zones ◽  
Conservation Area ◽  
Durio Zibethinus ◽  
Canopy Area ◽  
Cash Compensation ◽  
Production Forests

Abstract. Kuswanda W, Harahap RH, Alikodra JS, Sibarani R. 2020. Nest characteristics and populations of Tapanuli orangutans in Batangtoru Landscape, South Tapanuli District, Indonesia. Biodiversitas 21: 3398-3406. Tapanuli orangutan (Pongo tapanuliensis) has been threatened to extinction due to conflicts with humans. Information on the orangutan characteristics in conflict areas at the Batangtoru Landscape is needed. Our research aimed to analyze the characteristics of nests, nest trees, and estimation of orangutan populations in conservation forests and buffer zones to develop conflict mitigation strategies in the Batangtoru Landscape, South Tapanuli District. A line transect method was used to count orangutan nests on 49 transects, starting from June 2019 to January 2020. Data were analyzed with descriptive statistics, frequency tables, Spearman correlation (rho), and the equation by (van Schaick et al. 1995). Tapanuli orangutans make nests at the height of 14.01 meters (90% CI = 13.37-14.67 meters), and most use the main stem as nest support. Tree nests of 35 species (17 families) were identified, with the highest frequency in (Durio zibethinus Murray), especially in the buffer zone. Correlation between nest tree diameter, tree height, and canopy area was significant (p <0.01, n = 83). The estimated orangutan populations in conflict areas were 155 individuals (95% CI = 121-187), and the highest was found in Dolok Sibualbuali Nature Reserve buffer zones. Mitigation strategy of human-orangutan conflict that needs to be realized is the non-cash compensation guaranteeing the community does not disturb orangutans on their land. The compensation forms can be the provision of seedlings and fertilizer for plants, agricultural machinery, knowledge to land management, and orangutan ecotourism development. Nest and feed trees enrichment can be carried out in production forests bordering with conservation area.

GAMBARAN INDEKS LARVA AEDES AEGYPTI DI BUFFER WILAYAH KERJA BANDARA SEPINGGAN BALIKPAPAN

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Abdurrakhman abdurrakhman Abdurrakhman
Keyword(s):  
Aedes Aegypti ◽  
Buffer Zone ◽  
Chi Square ◽  
Cross Sectional ◽  
Breeding Sites ◽  
Dengue Disease ◽  
Vector Borne Diseases ◽  
Transportation Equipment ◽  
Chi Square Test ◽  
Larvae Density

ABSTRACT : The House index and Container Index in the buffer area of ​​the working area of ​​Balikpapan Sepinggan Airport is still above 1%, so the potential for the spread of dengue disease. Mobilization of people, goods and transportation equipment will increasingly affect the transmission of disease in ports and airports, especially for vector-borne diseases. This study aims to analyze the risk factors associated with larvae density of Aedes aegypti and describe the larvae index in the buffer zone of the Sepinggan Balikpapan Airport This study was a descriptive study with a cross sectional design. The sample in this study was 121 houses with a proportionate stratified random sampling, the research location was in the buffer zone of Sepinggan Balikpapan Airport in November 2018. The variables studied were houses with positive larvae containers, breeding sites and PSN behavior and larvasidation. The data was analyzed using the chi square test. There was a relationship between houses with larvae positive Aedes aegypti, behavior of Mosquito Nest Eradication (PSN) and larvasidation with larvae density of Aedes aegypti but not for breeding sites (p = 0.00 and 95% CI = 0.64), and   (p = 0.00 and 95% CI = 0.34). The description of several Aedes aegypti larvae index, namely House Index (HI) = 57.02%, Container Index (CI) = 24.36%, Bruteau Index (BI) = 148.76, and Flick Free Numbers (ABJ) = 42.98 %. Houses with larvae of Aedes aegypti larvae and PSN and larvasidation behavior were associated with larvae density of Aedes aegypti. The index of HI, CI and BI larvae is of high value so there is a risk of DBD transmission

scholarly journals Housing and population sprawl near tailings storage facilities in the Witwatersrand: 1952 to current

2015 ◽  
Vol Volume 111 (Number 11/12) ◽  
Author(s):  
Melanie A. Kneen ◽  
Matthew E. Ojelede ◽  
Harold J. Annegarn ◽  
◽  
◽  
...  
Keyword(s):  
Census Data ◽  
Buffer Zone ◽  
Housing Development ◽  
Aerial Photographs ◽  
Population Exposure ◽  
Residential Areas ◽  
Gold Extraction ◽  
Buffer Zones ◽  
Quality Dispersion ◽  
Storage Facilities

Abstract Mining, tailings storage facilities (TSFs), dust pollution and growth in residential housing development are synonymous with the Witwatersrand, South Africa. Encroachment of housing onto land close to TSFs, i.e. areas rendered marginal because of the dust hazard and risk of structural failure, has continued unabated for decades, intensifying human exposure to windblown mineral dust. Recent research indicates that the finer milling used for modern gold extraction results in aeolian dust emanating from the TSFs which contributes to a higher proportion of inhalable particles in the source material. Air quality dispersion modelling, validated by ambient aerosol monitoring campaigns, indicates that episodic dust events generate particulate matter (PM10) and, specifically, quartz dust concentrations that are unhealthy at distances of up to 2 km downwind from TSFs. This contribution documented residential development from 1952 to 2011 (using historical aerial photographs, census data from 2001 and 2011 and ancillary information) to determine the population exposed to dust emanations from the TSFs. Using the images, land use was classified into residential areas, TSF footprints and open areas, onto which a series of 500 m buffer zone contours were superimposed. The resulting statistics were used to assess the populations exposed to dust hazard within the defined buffer zones. Overall, housing development has experienced a growth of approximately 700% since 1952 at a rate of 14% per year. Analysis of recent monitoring campaign data has confirmed multiple occurrences of quartzrich inhalable dust in residential settings at levels that exceed occupational health standards, extrapolated to values for population exposure.

scholarly journals High turn-over rates at the upper range limit and elevational source-sink dynamics in a widespread songbird

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Martin U. Grüebler ◽  
Johann von Hirschheydt ◽  
Fränzi Korner-Nievergelt
Keyword(s):  
Environmental Gradients ◽  
Elevational Gradient ◽  
High Elevation ◽  
Range Limit ◽  
Apparent Survival ◽  
Breeding Sites ◽  
Mobile Species ◽  
Source Sink ◽  
Turn Over ◽  
High Elevations

AbstractThe formation of an upper distributional range limit for species breeding along mountain slopes is often based on environmental gradients resulting in changing demographic rates towards high elevations. However, we still lack an empirical understanding of how the interplay of demographic parameters forms the upper range limit in highly mobile species. Here, we study apparent survival and within-study area dispersal over a 700 m elevational gradient in barn swallows (Hirundo rustica) by using 15 years of capture-mark-recapture data. Annual apparent survival of adult breeding birds decreased while breeding dispersal probability of adult females, but not males increased towards the upper range limit. Individuals at high elevations dispersed to farms situated at elevations lower than would be expected by random dispersal. These results suggest higher turn-over rates of breeding individuals at high elevations, an elevational increase in immigration and thus, within-population source-sink dynamics between low and high elevations. The formation of the upper range limit therefore is based on preference for low-elevation breeding sites and immigration to high elevations. Thus, shifts of the upper range limit are not only affected by changes in the quality of high-elevation habitats but also by factors affecting the number of immigrants produced at low elevations.

scholarly journals The landscape concept of environment in Taman Gajah Mada Medan

2021 ◽  
Vol 922 (1) ◽  
pp. 012035
Author(s):  
A F Abus ◽  
T Lubis ◽  
N A A Abus
Keyword(s):  
Transition Zone ◽  
General Public ◽  
Outdoor Recreation ◽  
Open Space ◽  
Buffer Zone ◽  
Open Spaces ◽  
Public Open Space ◽  
North Sumatra ◽  
Sports Activities ◽  
Public Open Spaces

Abstract Taman Gajah Mada is an outdoor recreation landscape located on Jalan Gajah Mada Medan, North Sumatra. Residents around Medan use this landscape to carry out sports activities. Usually, Taman Gajah Mada is visited by visitors in the morning and evening. Visitors who come in the morning usually come to just exercise. Meanwhile, visitors who come in the afternoon typically sit around enjoying the afternoon atmosphere in this beautiful and clean garden. This study was qualitative, and the ethnography method was applied to collect and analyze the data. The analysis also deliberated the unity of multidiscipline landscape architects and landscape anthropology to explain the use of outdoor recreation in Taman Gajah Mada. This literature becomes a reference for research on the concept of public open space at Taman Gajah Mada to maintain cultural originality in the use of roars in the landscape. This study indicates three public open spaces, namely the buffer zone, transition zone, andcore zone. These three public open spaces can be grouped into two based on their function and purpose: general and special public open spaces. The general public open spaces such as transition zoneand core zonecan be utilized and used by the entire community, while special ones such as the Buffer Zone are buffer areas.

scholarly journals Geopolitical Discrimination of Some Countries as Exemplified by Ukraine: Difficulties and Perspectives

2018 ◽  
pp. 666-670
Author(s):  
Olha Bohomolets
Keyword(s):  
United States ◽  
Low Cost ◽  
Geographical Location ◽  
Buffer Zone ◽  
The United States ◽  
Western World ◽  
Collective Security ◽  
Buffer Zones ◽  
International Power ◽  
Post War

The article studies the history and the current stage of Russia’s aggression to-wards countries with lower military potential. The collapse of the post-war system of international relations and collective security has become apparent: the aggression of Russia against Moldova, Georgia and Ukraine has testified to the fact that there are no longer any tools to protect countries subjected to discrimination from super powers. Today discrimination affects not only people or social groups, but also some countries. Such countries are not capable of pursuing an independent policy as to major centres of international power they have to deal with. Peculiar to these countries are uncompetitive economy, low quality of life and undeveloped civil society, they hence become a target for “vital interests”, namely bidding by so-called super powers. “Giants” are attracted by the geographical location of a possible “victim”, access to the sea, transit facilities, natural resources, especially energy, low-cost labour, etc. It is often that “discriminated” countries become grounds for ignition of burning or frozen conflicts provoked by powerful neighbours’ influence, or are exposed to open aggression and become subject to occupation or hybrid war. This has all started after the Second World War, when super powers of the USSR and China, on the one hand, and the United States, Great Britain, Australia, and others, on the other, have made Korea fall into two states. In addition, there was subsequently a division of Germany, the Caribbean crisis…However, such conflicts then were not that wide-ranging, since the post-war collective security system was quite effective. Things, though, have changed dramatically in recent decades. One of the largest global players − Russia – has decisively begun to create around itself a buffer zone formed of countries, where it fuels frozen conflicts and in such a way keeps them under the radar and hinders their integration into the Western world. Initially, Russia ignited a conflict in Nagorno-Karabakh, supporting Armenia and assisting it to invade a considerable part of the territory in Azerbaijan, and then initiated the war in Transnistria by virtually occupying part of Moldova’s territory and asserting itself there on the pretext of deploying a peacekeeping mission. Later, there was a war in Abkhazia and then − in South Ossetia aiming to detach part of Georgia’s territory. And lastly, the turn of Ukraine has come… Regrettably, Ukraine is a typical and another example of a country that has fallen victim of multifaceted interests of the leading global players − Russia, the United States and the EU, and has faced all possible forms of discrimination. Keywords: war in eastern Ukraine, military aggression, geopolitics, conflicts, buffer zones.

scholarly journals Vegetated Buffer Zone Restoration Planning in Small Urban Watersheds

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3000
Author(s):  
Yucong Duan ◽  
Jie Tang ◽  
Zhaoyang Li ◽  
Bo Yang ◽  
Yu Yan ◽  
...  
Keyword(s):  
Land Use Planning ◽  
Buffer Zone ◽  
Field Investigation ◽  
Urban Land Use ◽  
Urban River ◽  
Management Policy ◽  
Runoff Simulation ◽  
Buffer Zones ◽  
Land Occupation ◽  
Restoration Planning

Vegetated buffer zones (VBZ) are accepted worldwide as a low impact method to avoid non-point source pollution and restore the balance of river ecosystems. Strongly influenced by industrialization and urbanization, urban river ecology is seriously damaged, and restoration is tricky. This study established a complete buffer zone construction framework suitable for the small urban watershed, and its feasibility is verified in a small watershed in Northern China. First, common plants in the study area were selected to test their ability to purify pollutants, and plant combinations were optimized. Secondly, according to the field investigation, the reference buffer zone was determined, and its sewage interception capacity was tested through a runoff simulation experiment. Then, based on GIS and Phillips time and hydraulic models, the normal buffer width of the study area was obtained; 60 m for mainstream and 40 m for tributaries. By optimizing the vegetation scheme and delimiting an efficient buffer zone, the land occupation can be reduced by 17%. Finally, combined with the characteristics of different river sections, an elaborate VBZ restoration scheme is designed from the aspects of vegetation, planning, and zoning. Generally, this research will provide government and land managers scientific and practical ideas and technologies to formulate a land management policy for urban river buffer zones in order to find a balance between aquatic ecological protection and urban land use planning and optimize the allocation of construction funds.

Spaces of Intentionality: Race, Class, and Horizontality at the United States Social Forum

2008 ◽  
Vol 13 (4) ◽  
pp. 353-372 ◽  
Author(s):  
Jeffrey Juris
Keyword(s):  
United States ◽  
Middle Class ◽  
Open Space ◽  
The United States ◽  
World Social Forum ◽  
High Profile ◽  
Democratic Practice ◽  
The World ◽  
High Level

The World Social Forum process has sought to provide an "open space" for diverse movements to exchange ideas, interact, and coordinate as they build another world. Despite this inclusive impulse, many of the forums have been disproportionately white and middle class. Through an ethnographic account of the 2007 United States Social Forum (USSF) in Atlanta, I examine one high-profile attempt to overcome this lack of diversity by establishing what I refer to as an "intentional" space. I argue that the intentional strategy pursued by USSF organizers achieved a high level of diversity in racial and class terms, but de-emphasized the role of the forum as a "contact zone" for translation, sharing, and exchange among diverse movement sectors. However, given the strong desire to overcome past exclusions among participants, the privileging of intentionality over openness and horizontality was widely viewed as legitimate, which has important implications for democratic practice.

scholarly journals Distribution and abundance of baling twine in the landscape near Osprey (Pandion haliaetus) nests: implications for nestling entanglement

2014 ◽  
Vol 128 (2) ◽  
pp. 173 ◽  
Author(s):  
Renee Seacor ◽  
Kayhan Ostovar ◽  
Marco Restani
Keyword(s):  
Buffer Zone ◽  
Urban Landscapes ◽  
Pandion Haliaetus ◽  
Short Term ◽  
Road Density ◽  
Buffer Zones ◽  
Yellowstone River ◽  
Power Company ◽  
Breeding Seasons ◽  
High Road

Polypropylene baling twine used by Ospreys (Pandion haliaetus) during nest construction creates a risk of entanglement for nestlings and adults on the yellowstone River, Montana. In 2013, we evaluated the abundance of twine in 2-km-radius buffer zones centred on 38 nests for three categories of road density. We found more twine per kilometre along roads in low (n = 19) and moderate (n = 13) road density nest buffer zones than in high road density nest buffer zones (n = 6). The estimated total amount of twine found along roads in nest buffer zones ranged from 0 to 2602 m and did not differ among road density strata. The percentage of Osprey nests containing twine was highest in low (63.2%) and moderate (61.5%) road density nest buffer zones and lowest (33.3%) in high road density buffer zones, which reflected a gradient from rural and suburban to urban landscapes. The estimated total amount of twine within a nest buffer zone did not predict whether a nest contained twine. The amount of twine found in seven nests destroyed by wind or power company personnel ranged from 0 to 206 m and was not correlated with the amount of twine found in their buffer zones. During the 2012 and 2013 breeding seasons, four of 120 nestlings (3.3%) became entangled in twine: two were cut free and fledged normally, one died, and one was euthanized. The abundance of twine in the environment surrounding nests and its slow rate of biodegradation mean that vigilance by citizen scientist nest monitors and assistance from power companies are the only short-term solution to reducing mortality resulting from entanglement.

scholarly journals The vulnerability analysis of catchment areas using rapid assessment method (case study in Universitas Indonesia, Depok)

2018 ◽  
Vol 192 ◽  
pp. 02033
Author(s):  
Eva Rolia ◽  
Dwita Sutjiningsih ◽  
Fitria Fitria
Keyword(s):  
Catchment Area ◽  
Rapid Assessment ◽  
Buffer Zone ◽  
Assessment Method ◽  
Rapid Assessment Method ◽  
Catchment Areas ◽  
High Level ◽  
Initial Classification

Catchment area of aquatic system in Universitas Indonesia (UI) campus has a function as groundwater recharge for Depok area, which is the buffer zone of Jakarta. This catchment area has high level of imperviousness as a consequence of increasing population. The high imperviousness implicates in the degradation of the catchment area health. For that reason, the vulnerability assessment of UI catchment area is needed to arrange of restoration recommendation. This research applies Rapid Assessment Method which implements eco-hydrological concepts including aquatic and riparian condition as well as imperviousness of catchment area. Locations of the research are Kenanga and Agathis catchments area. The result of initial classification based imperviousness both catchment areas are categorised as Non-Supporting, where the imperviousness of Kenanga and Agathis is 31,0% and 77,18% respectivelly. Based on the assessment on aquatic and riparian condition as well as future land use, the final classification of both catchment areas is Restorable Non-Supporting catchment area.

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