|
|
|
| Registros recuperados: 713 | |
|
|
| Abreu,Mariângela Fernandes; Pinto,José Roberto Rodrigues; Maracahipes,Leandro; Gomes,Letícia; Oliveira,Edmar Almeida de; Marimon,Beatriz Schwantes; Marimon Junior,Ben Hur; Farias,Josenilton de; Lenza,Eddie. |
| The present study analyzed the influence of edaphic variables on the floristic compositions and structures of the arboreal and shrub vegetation of typical cerrado (TC) and rocky outcrop cerrado (RC) communities in the Serra Negra mountain range in Piranhas Municipality, Goiás State, Brazil. Ten 20×50m plots were established in each community, and all individuals with minimum diameters ³5cm measured at 30cm above soil level were sampled. Composite soil samples were collected at 0-20cm depths in each plot for physical and chemical analyses. The proportions of above-ground rock cover work also estimated in each RC plot. A total of 2,009 individuals (83 species, 69 genera, and 34 families) were recorded. Qualea parviflora was the only species consistently... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Rocky outcrops; Savanna; Soils. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000300005 |
| |
|
|
| ACEVEDO,Aldemar A.; ARMESTO SANGUINO,Orlando; OLARTE QUIÑÓNEZ,Camilo Andrés; SOLANO,Liliana; ALBORNOZ ESPINEL,Mónica María; CABRERA,James Alexis; CARRERO SARMIENTO,Diego Armando. |
| ABSTRACT We present an estimation of the potential species richness of frogs, and diurnal butterflies distributed in the departments of Norte de Santander and Santander, Colombia, and analyze the implications for conservation of such high Andean species. From June 2012 to May 2016, we sampled across the Almorzadero, Santurbán and Tamá biogeographical units to gather presence data of 7 anuran species and 29 butterflies species from the superfamily Papilionoidea. We modeled the potential distribution of each species, converted every model to binary, and the sum up of unique species per cell allowed to estimate the model of potential richness, generating the total number of species for every 1 km2 cell. Every model was validated against field data, vegetation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biogeography; Biological diversity; Conservation; High Andean species; Species distribution models. |
| Ano: 2018 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2018000200151 |
| |
|
|
| Adite, A.. |
| A preliminary study of the mangrove fishes was undertaken from March 2000 to September 2001 in the Benin estuarine lagoon system in connected to the Mono river; a dam was constructed on this river to provide the Togo and Benin countries with electricity. The research aims to investigate fish species diversity and ecosystem degradation impacts in order to protect and to improve the mangrove fish resources. Specific objectives were (1) to investigate fish assemblages and distribution in the mangrove/estuarine habitat; (2) to investigate relationships between environment features and biological attributes; (3) to evaluate the estuarine ecosystem degradation, with regard to mangrove destruction and recent evolution of the Mono river caused by a dam... |
| Tipo: Preprint |
Palavras-chave: Mangroves; Conservation; Dams. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/455 |
| |
|
|
| Agreda, A.; Torres, S.; Haase, B.; Samaniego, J.. |
| Esta investigación es parte de un estudio de prospección sísmica dentro del proyecto denominado Investigación Geofísica de la Plataforma Continental del Ecuador. En esta investigación se realizó un levantamiento de información sobre diversidad, abundancia y estado poblacional y de conservación de las aves marinas en aguas continentales ecuatorianas y se identificó sitios sensibles y prioritarios para la conservación. Este estudio registró un total de 27 especies de aves marinas pertenecientes a 10 familias. La familia que registró el mayor número de especies fue Laridae (gaviotas y gaviotines) con ocho especies. La composición de especies registradas incluyó a formas marinas migratorias con 17 especies y residentes con nueve especies que se reproducen en... |
| Tipo: Journal Contribution |
Palavras-chave: Marine birds; Geographical distribution; Species diversity; Abundance; Conservation. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4227 |
| |
|
| |
|
| |
|
|
| ALBERTONI,FABIANO F.; MIELKE,CARLOS G.C.; DUARTE,MARCELO. |
| Abstract The light-attracted silk moths (Lepidoptera: Saturniidae) of the Boraceia Biological Station in the municipality of Salesópolis, state of São Paulo, southeastern Brazil have been sampled over more than seven decades (1942-2013). A total of 6,288 individuals (including a gynandromorph) belonging to five subfamilies, 46 genera and 133 species were identified. Hemileucinae was the most abundant and speciesrich subfamily, followed by Ceratocampinae, Arsenurinae, Saturniinae, and Oxyteninae. Hylesia Hübner, Automeris Hübner, and Dirphiopsis Bouvier (Hemileucinae) were the dominant genera in abundance and species richness. Only Automeris illustris (Walker), Gamelia remissoides Lemaire, and Hidripa paranensis (Bouvier) (Hemileucinae) were recorded in all... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation; Inventory; Neotropical; Phenology; Research promotion; Silk moths. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602827 |
| |
|
| |
|
|
| Alig, Ralph J.; Adams, Darius M.; McCarl, Bruce A.. |
| The forest and agriculture sectors are linked by having a portion of their land bases suitable for use in either sector. A substantial part of the southern land base is suitable for either forestry or agriculture use, with most of forestation on U.S. agriculture land in the South. We examine how land exchanges between forestry and agriculture are influenced by specific federal conservation and farm support policies, including changes in the Conservation Reserve Program. Reallocation of land is a significant part of the sectors' responses to the policies, along with intensification of timber management on existing southern forests. |
| Tipo: Journal Article |
Palavras-chave: Agriculture; Conservation; Forest sector; Land use; Projections; Land Economics/Use. |
| Ano: 1998 |
URL: http://purl.umn.edu/15557 |
| |
|
| |
|
| |
|
|
| Almazán-Núñez,R. Carlos; Alvarez-Alvarez,Edson A.; Ruiz-Gutiérrez,Fernando; Almazán-Juárez,Ángel; Sierra-Morales,Pablo; Toribio-Jiménez,Sarahi. |
| Abstract: Cloud forest ecosystems contain unique flora and fauna characterized by high levels of richness and endemism. However, this ecosystem is one of the most threatened because of land-use changes stemming from anthropogenic activities. Therefore, biological inventories are necessary to adequately assess the effects of land-use changes on species now and in the future. In this study, we conducted an inventory of plants and terrestrial vertebrates (amphibians, reptiles, birds, and mammals) in three fragments of cloud forest in southwestern Mexico. Field work was carried out for 15 days per biological group during distinct time periods (2005-2008). Conventional methods of species capture and observation were employed to record species. Recorded species... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cloud forest; Conservation; Diversity; Terrestrial vertebrates; Flora; Species richness. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200306 |
| |
|
| |
|
|
| Almeida-Gomes,Mauricio; Siqueira,Carla Costa; Borges-Júnior,Vitor Nelson Teixeira; Vrcibradic,Davor; Ardenghi Fusinatto,Luciana; Frederico Duarte Rocha,Carlos. |
| Species inventories are useful tools to improve conservation strategies, especially in highly threatened biomes such as the Brazilian Atlantic Forest. Here we present a species list of amphibians and reptiles for the Reserva Ecológica de Guapiaçu (REGUA), a forest reserve located in the central portion of Rio de Janeiro state, Brazil. The list results from an extensive sampling effort that lasted ten years. A total of 73 amphibian (of which ten are endemic to the state) and 37 reptile species was recorded from the area. Five amphibian species are presently categorized by the IUCN as “data-deficient”, two as “near threatened” and one as “endangered”, whereas one reptile species is categorized as “vulnerable”. Our results showed that REGUA harbors about... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amphibians; Atlantic Forest; Conservation; Hotspot; Reptiles. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000300201 |
| |
|
| |
|
|
| Alvarez Alemán, A. |
| Se estudió la población del manatí antillano (Trichechus manatus) presente en la Ensenada de la Siguanea. Se colectó información acerca de los avistamientos de la especie, tamaño de los grupos, conductas, composición de la dieta y amenazas potenciales. Además se realizó la caracterización de sushábitats principales. Se utilizaron diversas metodologías que incluyeron muestreos en botes, a partir de recorridos y desde estaciones fijas, colecta e identificación de especies vegetales, colecta y análisis de material fecal y entrevistas a pescadores. Se determinó que la zona de estudio presenta un conjunto de características adecuadas para la supervivencia de la especie, como disponibilidad de alimento, temperatura del agua apropiada, fuentes de agua dulce,... |
| Tipo: Theses and Dissertations |
Palavras-chave: Habitat selection; Conservation; Aquaculture. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/5697 |
| |
|
| |
|
| |
|
|
| Anderson, John D.; Parkhurst, Gregory M.. |
| Changes to commodity programs in the 2002 Farm Bill increased the value of crop base acreages on which decoupled payments are received. The bill also expanded the availability of key conservation programs. This paper compares the value of payments from commodity programs (along with continued crop production) to the easement payment (and recreational lease revenue) available under the Wetland Reserve Program. A net present value model using risk-adjusted returns is employed in the analysis for Mississippi delta cropland containing rice, cotton, and soybean base. Sensitivity analysis is conducted on some of the key variables affecting the decision. |
| Tipo: Journal Article |
Palavras-chave: Conservation; Countercyclical payment; Direct payment; Net present value; WRP; Q12; Q15; Q18; C15. |
| Ano: 2004 |
URL: http://purl.umn.edu/43390 |
| |
|
| |
| Registros recuperados: 713 | |
|
|
|
