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Registros recuperados: 9
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A multidisciplinary approach to the spatial dimension in ecosystem-based fisheries management ArchiMer
Le Floc'H, Pascal; Bertignac, Michel; Curtil, Olivier; Macher, Claire; Mariat-roy, Emilie; Paulet, Yves-marie.
This study considers how to reconcile different spatial scales to find the best common denominator to be used as an ecosystem-based management unit. For this, two fishery production zones differing ecologically, economically, legally and institutionally were investigated. The first case study is located within French territorial waters, in a MPA created in 2007- the Parc Naturel Marin d'Iroise (PNMI). The second case study, the Bay of Biscay, covers both territorial waters and the French exclusive economic zone. The paper adopts a multidisciplinary approach. Relevant questions concern how marine space is shared between exploited species and fishing fleets, especially the spatial mobility strategies they employ. An assessment of the institutional system...
Tipo: Text Palavras-chave: Spatial scale; Ecosystem-based fisheries management; Marine protected area; Socio-system.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00460/57191/59156.pdf
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Assessing Extinction Risk: Integrating Genetic Information Ecology and Society
Dunham, Jason; University of Nevada-Reno; jdunham@proaxis.com; Peacock, Mary; University of Nevada-Reno; mpeacock@scs.unr.edu; Tracy, C. Richard; University of Nevada-Reno; dtracy@unr.edu; Nielsen, Jennifer; Stanford University; jnielsen@leland.stanford.edu; Vinyard, Gary; University of Nevada-Reno; gvinyard@med.unr.edu.
Risks of population extinction have been estimated using a variety of methods incorporating information from different spatial and temporal scales. We briefly consider how several broad classes of extinction risk assessments, including population viability analysis, incidence functions, and ranking methods integrate information on different temporal and spatial scales. In many circumstances, data from surveys of neutral genetic variability within, and among, populations can provide information useful for assessing extinction risk. Patterns of genetic variability resulting from past and present ecological and demographic events, can indicate risks of extinction that are otherwise difficult to infer from ecological and demographic analyses alone. We provide...
Tipo: Peer-Reviewed Reports Palavras-chave: Extinction risk; Genetic variation; Incidence function analysis; Population viability analysis; Ranking methods; Risk assessment; Spatial scale; Temporal scale..
Ano: 1999
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Calopteryx Damselfly Dispersions Arising from Multiscale Responses to Landscape Structure Ecology and Society
Jonsen, Ian; University of Alberta; jonseni@em.agr.ca; Taylor, Philip D; Acadia University; ptaylor@resalliance.org.
Using spatially explicit simulation models, we explored the extent to which fine-scale (i.e., meters to tens of meters) movement behaviors could be used to predict broader scale patterns of distribution on heterogeneous landscapes. Our models were tailored by empirical data on Calopterygid damselfly movements on three types of landscapes that differed in amount of forest habitat. Surveys of the two congeneric damselflies, Calopteryx aequabilis and Calopteryx maculata, demonstrated that both species occupied stream and forest habitats on forested and partially forested landscapes, but were found primarily along streams on nonforested landscapes. Simulation models whose parameters were derived using empirical movement data for both species showed that...
Tipo: Peer-Reviewed Reports Palavras-chave: Calopteryx aequabilis; Calopteryx maculata; Connectivity; Damselflies; Landscape structure; Movement behaviors; Multiscale dispersion; Patch boundary permeability; Patch viscosity; Simulation model; Spatial scale.
Ano: 2000
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Environmental drivers of benthic communities: the importance of landscape metrics IPB - Escola Superior Agrária
Cortes, R.; Varandas, S.; Hughes, S.; Magalhães, M.; Teixeira, Amílcar.
The distribution of aquatic communities is dependent on processes that act at multiplescales. This study comprised 270 samples distributed over 2 years and used a nested sampling design to estimate the variance associated with three spatial scales: basin, site and microhabitat. Habitat assessment was made using River Habitat Survey. The derived Habitat Quality Indices and the benthic composition were crossed with landscape metrics and types of soil use, obtained from GIS data, using multiple non-parametric regressions and distance-based redundancy analysis. Invertebrate variation was mainly linked with intermediate scale (site) and landscape metrics were the main drivers determining local characteristics. The aquatic community exhibited a stronger...
Tipo: ConferenceObject Palavras-chave: Landscape metrics; Soil use; Macroinvertebrates; Habitat; Spatial scale.
Ano: 2010 URL: http://hdl.handle.net/10198/4662
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Environmental drivers of benthic communities: the importance of landscape metrics IPB - Escola Superior Agrária
Cortes, R.; Varandas, S.; Hughes, S.; Magalhães, M.; Teixeira, Amílcar.
The distribution of aquatic communities is dependent on processes that act at multiplescales. This study comprised 270 samples distributed over 2 years and used a nested sampling design to estimate the variance associated with three spatial scales: basin, site and microhabitat. Habitat assessment was made using River Habitat Survey. The derived Habitat Quality Indices and the benthic composition were crossed with landscape metrics and types of soil use, obtained from GIS data, using multiple non-parametric regressions and distance-based redundancy analysis. Invertebrate variation was mainly linked with intermediate scale (site) and landscape metrics were the main drivers determining local characteristics. The aquatic community exhibited a stronger...
Tipo: ConferenceObject Palavras-chave: Landscape metrics; Soil use; Macroinvertebrates; Habitat; Spatial scale.
Ano: 2010 URL: http://hdl.handle.net/10198/5031
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Spatial scale effects of sampling on the interpolation of species distribution models in the southwestern Amazon. Repositório Alice
FIGUEIREDO, S. M. de M.; VENTICINQUE, E. M.; FIGUEIREDO, E. O..
Knowledge of the geographical distribution of timber tree species in the Amazon is still scarce. This is especially true at the local level, thereby limiting natural resource management actions. Forest inventories are key sources of information on the occurrence of such species. However, areas with approved forest management plans are mostly located near access roads and the main industrial centers. The present study aimed to assess the spatial scale effects of forest inventories used as sources of occurrence data in the interpolation of potential species distribution models. The occurrence data of a group of six forest tree species were divided into four geographical areas during the modeling process. Several sampling schemes were then tested applying the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Escala espacial; Spatial scale; Interpolação; Interpolation; Interpolación; Modelo de distribuição de espécies; Species distribution models; Modelos de distribución de especies; Sudoeste da Amazônia; Southwest Amazon; Essência florestal; Inventário florestal; População de planta; Modelo de simulação; Programa de computador; Tropical wood; Forest inventory; Flora; Computer simulation; Madera tropical; Inventario forestal; Simulación por computadora.
Ano: 2016 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1056281
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Spatial structure and scale-dependent microhabitat use of endemic "tapaculos" (Rhinocryptidae) in a temperate forest of southern South America Ecología austral
Amico,Guillermo C; García,Daniel; Rodríguez-Cabal,Mariano A.
Endemic tapaculo birds (Rhinocryptidae) are biological indicators of habitat degradation in the temperate forest of southern South America, but little is known about the physiognomical features that determine the use of space in natural habitats. We studied the spatial structure and the microhabitat use at different spatial scales of species of tapaculos in a well-conserved forest of NW Patagonia (Argentina). We recorded the abundance of tapaculos and forest characteristics along a 1500 m transect divided in 75, 20 x 20 m contiguous plots. We evaluated the spatial patchiness in abundance of birds by Moran's I correlograms. We disentangled the spatial variability of bird abundance at three different, progressively finer (broad, intermediate, fine), spatial...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Understory birds; PCNM; Pteroptochos tarnii; Scelorchilus rubecula; Spatial patchiness; Spatial scale.
Ano: 2008 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2008000200002
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The Question of Scale in Integrated Natural Resource Management Ecology and Society
Lovell, Chris; Centre for Ecology and Hydrology; c&c.lovell@xtra.co.nz; Mandondo, Alois; ; mandondo@africaonline.co.zw; Moriarty, Patrick; ; moriarty@irc.nl.
Lessons from integrated natural resource management (INRM) practiced at different scales are reviewed, with a focus on catchment management. INRM is complex, and many interactions have to be addressed. Consequently, the scale of investigation can restrict the generality and utility of the findings. Examples show that temporal, biophysical, and institutional scales can each be critical. Contexts and dynamics associated with particular scales, and interactions or lateral flows that become important with increasing scale, also pose serious challenges. A conceptual framework is presented for scaling issues in INRM and how to deal with them. To benefit many people over large areas within sensible time frames requires considerable political will, investment, and...
Tipo: Peer-Reviewed Reports Palavras-chave: Common property management; Community-based natural resource management; Devolution; Going to scale; Integrated catchment management; Integrated natural resource management; Integrated water resource management; Participatory watershed development; Scaling-out; Scaling-up; Spatial scale; Temporal scale.
Ano: 2002
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景観構造を考慮したニホンジカによる水稲被害発生機構の解明とリスクマップの作成 OAK
高田, まゆら; 鈴木, 牧; 落合, 啓二; 浅田, 正彦; 宮下, 直; Takada, Mayura; Suzuki, Maki; Ochiai, Keiji; Asada, Masahiko; Miyashita, Tadashi.
シカによる水稲被害が深刻化している千葉県房総半島南部において、約 350 軒の稲作農家を対象とした聞き取りアンケート調査から、シカによる水稲被 害のレベルを定量化し、それをシカの局所密度と水田周辺の景観構造により説 明する統計モデルを構築した。その結果、被害レベルはシカ密度に加え、対象 水田から半径400m 以内の景観構造により影響を受けていることが明らかにな った。具体的には、水田周囲の森林率の増加に伴い被害は大きくなること、ま たシカの高密度地域では周辺景観の林縁長が長いと被害が軽減される傾向があ ることがわかった。この空間スケールは、既往研究から示された房総のシカの 行動圏や食物の質、妊娠率が決まる空間スケールとほぼ一致していた。次に統 計モデルを用いて被害が軽度に維持されるシカ密度をシカ分布域とその周辺を 含めた地域で推定し、水稲被害のリスクマップを作成したところ、被害が軽度 に維持されるシカ密度は地域の景観構造により大きく異なることがわかった。 異質な景観構造をもつ地域では、こうしたリスクマップと現在のシカ生息密度 とを比較し、短期的な捕獲目標個体数を局所レベルで定めることで、被害防除 努力をより効率的に配分することができるだろう。 The sika deer population (Cervus nippon) in the Boso Peninsula of Chiba, central Japan, has expanded dramatically in recent decades, causing serious damage to rice crops. To predict the level of damage, we conducted approximately 350...
Palavras-chave: アンケート調査; 大型草食獣; 空間スケール; 地理情報システム; 農業被害; Agricultural damage; Geographic information system; Interview survey; Large herbivore; Spatial scale.
Ano: 2010 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2885
Registros recuperados: 9
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