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| Registros recuperados: 10 | |
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| Bagstad, Kenneth J.; Geosciences & Environmental Change Science Center, U.S. Geological Survey; kjbagstad@usgs.gov; Villa, Ferdinando; Basque Centre for Climate Change (BC3), IKERBASQUE, Basque Foundation for Science, Spain; ferdinando.villa@bc3research.org; Batker, David; Earth Economics; dbatker@eartheconomics.org; Harrison-Cox, Jennifer; Earth Economics; jcox@eartheconomics.org; Voigt, Brian; Gund Institute for Ecological Economics, University of Vermont; bvoigt@uvm.edu; Johnson, Gary W.; Gund Institute for Ecological Economics, University of Vermont; gwjohnso@uvm.edu. |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Beneficiaries; Benefits; Demand side; Mapping; Provisioning areas; Spatial dynamics; Spatial flow. |
| Ano: 2014 |
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| McDaniel, Carrie J; Duke University Marine Laboratory; cjmcdaniel@hotmail.com; Crowder, Larry B; Duke University Marine Laboratory; lcrowder@duke.edu; Priddy, Jeffery A; Duke University Marine Laboratory; jpriddy@duke.edu. |
| In order to examine the scientific feasibility of area closures for sea turtle protection, we determined the spatial dynamics of sea turtles for the U.S. Gulf of Mexico by analyzing National Marine Fisheries Service (NMFS) aerial survey data in September, October, and November of 1992, 1993, and 1994. Turtle sightings were grouped into depth zones and NMFS fishery statistical zones, and strip transect methods were used to estimate the relative abundance of sea turtles in each subzone. Average shrimping intensity was calculated for each subzone for all months of 1992, 1993, and 1994, as well as for the months and locations of the aerial survey. The spatial overlap of sea turtle abundance and shrimping intensity suggested regions where interactions are... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Density estimates; Endangered species; GIS; Gulf of Mexico; Kemp's ridley; Management; Sea turtles; Shrimp fishing; Spatial dynamics; Strip transect methods. |
| Ano: 2000 |
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| Elias,Fernando; Teixeira,Nayara D. A; Marimon Junior,Ben Hur. |
| In the present study, we tested the hypothesis that: a) bromeliad Ananas ananassoides individuals and Tachigali vulgaris tree individual have an aggregate distribution pattern, and b) are spatially dissociated. To this effect, we quantified all A. ananassoides and T. vulgaris individuals (DBH of at least 30 cm) in large plot (1 ha) composed by 100 subplots measuring 10×10 m in a savanna woodland in the Bacaba Municipal Park, Nova Xavantina, Mato Grosso. The spatial pattern of A. ananassoides and T. vulgaris, and their spatial relationships, were measured using the aggregation and the association index, respectively. Both species had an aggregate distribution pattern and were spatially dissociated, which corroborates the hypotheses of this study. In this... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Interspecific competition; Spatial dynamics; Gaps; Environmental heterogeneity; Competição interespecífica; Dinâmica espacial; Clareiras; Heterogeneidade ambiental. |
| Ano: 2017 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2017000300010 |
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| Moore, Bradley R.; Adams, Tim; Allain, Valerie; Bell, Johann D.; Bigler, Mark; Bromhead, Don; Clark, Sangaa; Davies, Campbell; Evans, Karen; Faasili, Ueta; Farley, Jessica; Fitchett, Mark; Grewe, Peter M.; Hampton, John; Hyde, John; Leroy, Bruno; Lewis, Antony; Lorrain, Anne; Macdonald, Jed I.; Marie, Amandine D.; Minte-vera, Carolina; Natasha, Janice; Nicol, Simon; Obregon, Pablo; Peatman, Thomas; Pecoraro, Carlo; Phillip, N. Bradley; Pilling, Graham M.; Rico, Ciro; Sanchez, Caroline; Scott, Robert; Scutt Phillips, Joe; Stockwell, Brian; Tremblay-boyer, Laura; Usu, Thomas; Williams, Ashley J.; Smith, Niamh. |
| Delineating the stock structure of highly-mobile, wide-ranging fishes subject to exploitation is a challenging task, yet one that is fundamental to optimal fisheries management. A case in point are stocks of skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus) and albacore tuna (Thunnus alalunga) in the Pacific Ocean, which support important commercial, artisanal, subsistence, and recreational fisheries, and contribute roughly 70 % of global commercial tuna catches. Although some spatial and temporal structuring is recognised within these stocks, growing evidence from a range of approaches suggests that the stock structure of each tuna species is more complex than is currently assumed in both stock assessment... |
| Tipo: Text |
Palavras-chave: Tuna; Pacific Ocean; Movement; Spatial dynamics; Stock structure; Fisheries management. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00630/74168/73773.pdf |
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| Bertignac, Michel; Fernandez, Carmen; Methot, Richard. |
| European hake (Merluccius merluccius) is widely distributed over the north-east Atlantic shelf, from Norway to Mauritania. Despite its large distribution (covering ICES Division IIIa, Subareas IV, VI and VII and Divisions VIIIa,b,d, from Norway to the Bay of Biscay) and a complex population structure, the so-called northern stock of hake is currently assessed as a single unit, using a spatially aggregated implementation of the Stock Synthesis assessment model. In this study, a preliminary spatially explicit implementation of Stock Synthesis is developed, which accounts for the distribution of the hake population during its life cycle (nurseries and spawning areas) and the distribution of the fleets (trawlers, gillnetters and long-liners) exploiting the... |
| Tipo: Text |
Palavras-chave: Northern hake; Spatial dynamics; Population structure; Spatial stock assessment.. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00126/23764/21657.pdf |
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| Chen, Yong; Irwin, Elena G.; Jayaprakash, Ciriyam. |
| Recent work in regional science, geography, and urban economics has advanced spatial modeling of land markets and land use by incorporating greater spatial complexity, including multiple sources of spatial heterogeneity, multiple spatial scales, and spatial dynamics. Doing so has required a move away from relying solely on analytical models to partial or full reliance on computational methods that can account for these added features of spatial complexity. In the first part of the paper, we review economic models of urban land development that have incorporated greater spatial complexity, focusing on spatial simulation models with spatial endogenous feedbacks and multiple sources of spatial heterogeneity. The second part of the paper presents a spatial... |
| Tipo: Article |
Palavras-chave: Urban growth; Urbanization; Land development; Spatial dynamics; Heterogeneity; Agent-based models; Spatial interactions; Land Economics/Use; Research Methods/ Statistical Methods. |
| Ano: 2011 |
URL: http://purl.umn.edu/120644 |
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| Cini,Alessandro; Santosuosso,Ugo; Papini,Alessio. |
| ABSTRACT The fast tracking of invasion spatial patterns of alien species is crucial for the implementation of preventive and management strategies of those species. Recently, a honeybee pest, the small hive beetle Aethina tumida (hereafter SHB), has been reported in Italy, where it colonized more than 50 apiaries in an area of about 300 km2. SHB is a nest parasite and scavenger of honeybee colonies native of Sub-Saharian Africa. Likely being helped by the globalization of apiculture, SHB underwent several invasions in the last twenty years, causing locally relevant economic impact. While many features of its biology have been addressed, an important knowledge gap concerns the spatial invasion dynamics in invaded areas. In this paper we coupled two spatial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; DBSCAN; Invasive alien species; Pest species; Spatial dynamics; Small hive beetle; Notifiable disease. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262019000100012 |
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| Registros recuperados: 10 | |
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