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| Registros recuperados: 900 | |
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| Georgii A. Alexandrov; Gen Inoue; Tsuneo Matsunaga. |
| Productivity of ecosystems surrounding a city is important for supporting its activities in a sustainable way. The total terrestrial net primary production (NPP) shows biosphere potential to supply primary food energy source for all non-autotrophic species including humans. Humans appropriate approximately 20% of NPP, in average. Even in the relatively well-populated regions of Siberia, NPP per capita exceeds the average level by several times suggesting the window of opportunity for achieving sustainable development. (3 pages, 1086 words, 2 maps)
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| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/2478/version/1 |
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| Georgii A. Alexandrov; Gen Inoue; Tsuneo Matsunaga. |
| Recent publications on human appropriation of Net Primary Production (NPP) raise the question of how much of the biosphere’s productivity we can appropriate in a sustainable way. This article brings the issue into the context of Siberian development. In contrast to many other regions of the world, the population density in Siberia is still very low as compared to the NPP supplied by regional ecosystems. Hence, it is not too late to raise the question on how much of the NPP supplied by Siberian ecosystems we can appropriate in a sustainable way. |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/2478/version/2 |
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| Jeff Ollerton; Louise Cranmer; Ralph Stelzer; Steve Sullivan; Lars Chittka. |
| The Canary Islands are home to a guild of endemic, threatened bird pollinated plants. Previous work has suggested that these plants evolved floral traits as adaptations to pollination by flower specialist sunbirds, but subsequently they appear to be have co-opted passerine birds as sub-optimal pollinators. To test this idea we carried out a quantitative study of the pollination biology of three of the bird pollinated plants, Canarina canariensis (Campanulaceae), Isoplexis canariensis (Veronicaceae) and Lotus berthelotii (Fabaceae), on the island of Tenerife. Using colour vision models, we predicted the detectability of flowers to bird and bee pollinators. We measured pollinator visitation rates, nectar standing crops, as well as seed set and pollen... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Plant Biology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1977/version/1 |
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| Raf Aerts; Sarah Spranghers; Bruno Verbist; Luc Lens; Cagan Sekercioglu. |
| Shade coffee cultivation in the Peruvian Andes assists in reducing emissions from deforestation because it avoids conversion to non-forest land uses such as coca and sun grown coffee farming. REDD+ is a potential finance mechanism which may provide incentives for local coffee cooperatives to maintain high shade tree cover. REDD+ has potential multiple benefits other than carbon sequestration, including the conservation of biodiversity. When monitoring for REDD+, surveys of bird biodiversity may prove to be particularly valuable: apart from their high intrinsic value and their value as essential ecosystem service providers, birds inhabiting forest habitats are extremely sensitive to forest loss and forest degradation and are therefore potential useful... |
| Tipo: Poster |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6589/version/1 |
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| Ayesha S. Burdett; Rebecca J. Bixby. |
| Background/Question/Methods

In this study, we examined interactive effects of nutrient availability, river flow and food web structure on algal growth and species composition in the Middle Rio Grande, New Mexico. Algal community dynamics can be affected by both bottom-up and top-down factors. Algal production may be limited by low levels of nutrients or low light availability. Conversely, production is expected to increase when nutrient levels are high and light availability is not limited. Top-down factors such as grazing by invertebrates can also alter periphyton growth and community composition. Generally, a reduction in grazers results in periphyton biomass increases and shifts in growth forms (to more upright... |
| Tipo: Poster |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3664/version/1 |
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| K Seedikkoya; PA Azeez; EA Abdul Shukkur. |
| Regular intensive investigations to locate nesting colonies were carried out early monsoon of 1999 up to 2002. For detailed study a few breeding colonies were selected. The nesting trees, nest characteristics, eggs characteristics, incubation, hatching and hatchlings were investigated.

Altogether 17 plant species were used for nesting. Nest materials were collected from 24 plant species for building nest. The mean maximum size of the nest material used was 29.05 cm and the mean minimum size was 13.46 cm. The clutch size varied from 2-5 and clutches of three were very common. The maximum and minimum length and breadth of eggs were 48.0 x 32.0 and 33.3 x 24.1 respectively. The weight of eggs varied between 17.8 and 11.2 gm.... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/2558/version/1 |
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| Andres Ospina-Alvarez. |
| Breeding ecology and reproductive traits of Brown Booby _Sula leucogaster_ etesiaca in Gorgona Natural National Park, Colombia, were studied. Adults morphometrics, eggs dimensions, chicks growth and nesting site characteristics, were examined at three different locations in the park. As with other subspecies, Brown Booby in Gorgona presents inverted sexual dimorphism, with adult females being lengthier, wider and heavier than adult males. Breeding of S. l. etesiaca results in eggs from the first deposition bigger in weight and dimensions than eggs from the second or third deposition. Growth of brown boobies chicks fit to a natural log equation: bodymass(g) = 0.8773 ln(days) + 3.3895. A variety of spawning aggregations was found, and their relationship with... |
| Tipo: Manuscript |
Palavras-chave: Developmental Biology; Ecology; Earth & Environment. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/5620/version/1 |
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| Nigel E. Raine; Lars Chittka. |
| Despite the widespread assumption that the learning abilities of animals are adapted to the particular environments in which they operate, the quantitative effects of learning performance on fitness remain virtually unknown. Here we evaluate the learning performance of bumblebees (_Bombus terrestris_) from multiple colonies in an ecologically relevant associative learning task under laboratory conditions, before testing the foraging performance of the same colonies under the field conditions. We demonstrate that variation in learning speed among bumblebee colonies is directly correlated with foraging performance, a robust fitness measure, under natural conditions. Colonies vary in learning speed by a factor of nearly 5, with the slowest learning colonies... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1298/version/1 |
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| Ralph J. Stelzer; Lars Chittka. |
| Circadian rhythms enable organisms to anticipate and to prepare for predictable changes in their environment. Most previous studies on circadian rhythms focused on solitary animals. However, in social insects, the colony as a superorganism has a foraging rhythm aligned to the patterns of resource availability. Within this colony rhythm, the activity patterns of individuals are embedded. In temperate regions bumblebee foragers show strong circadian rhythms that adjust their foraging activity to the changing light conditions in the course of the day. But what about circadian foraging patterns under continuous daylight? One would assume that the colony as a whole extends its foraging activity over the whole 24 hours of a day under such light conditions to... |
| Tipo: Poster |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1719/version/1 |
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| Pablo Pita; Juan Freire. |
| For years now the estimates of the consequences of overfishing for marine ecosystems have differed greatly within the scientific community^1^. The use of commercial catch statistics to estimate tendencies has been much criticised^2^, but alternative information sources with long time series are rare. Here we employ the historic archive (1953-2007) of the recreational spearfishery in Galicia (NW Spain), which does not have the problems common to other fishery registers, to estimate long-term changes in coastal ecosystems. Using generalized additive regression models (GAM) we estimated decreases of around 83% in the abundances of coastal fish over the last 50 years. In the same period the average body size decreased by 36%. In addition, the relative catch... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4529/version/1 |
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| Wei Sheng Zeng; Shou Zheng Tang; Qian Hui Xiao. |
| Calorific values of plants are important indices for evaluating and reflecting material cycle and energy conversion in forest ecosystems. Based on the data of Masson Pine (Pinus massoniana) in southern China, the calorific values (CVs) and ash contents (ACs) of different plant organs were analyzed systematically using hypothesis test and regression analysis in this paper. The results show: (i) the CVs and ACs of different plant organs are almost significantly different, and the order by AFCV (ash-free calorific value) from the largest to the smallest is foliage (23.55 kJ/g), branches (22.25 kJ/g), stem bark (21.71 kJ/g), root (21.52 kJ/g) and stem wood (21.35 kJ/g); and the order by AC is foliage (2.35%), stem bark (1.44%), root (1.42%), branches (1.08%)... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6750/version/1 |
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| Dominique Bachelet; Dave Conklin; Brendan Rogers; Maureen McGlinchy; Jim Lenihan; Ron Neilson; Ray Drapek. |
| Background/Question/Methods:
Wildfires in the western U.S. are generally thought to have increased since the 1980s. Many factors have contributed to this increase such as fire suppression, livestock grazing, and urban sprawl. Fires have also been associated with variations in sea surface temperatures and described by indices such as El Niño Southern Oscillation (ENSO), the Pacific Decadal Oscillation (PDO), and the Atlantic Multidecadal Oscillation (AMO). Recent analyses have also shown that we may have entered a new fire regime starting with a climate shift in 1998 and are currently entering years of combined long-term warm AMO phase with cool ENSO and PDO phases usually associated with increased drought-induced fires in the... |
| Tipo: Presentation |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3618/version/1 |
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| Shinji Sugiura. |
| The Hawaiian Islands have allowed insects to evolve unique habits, because the islands are isolated and originally lacked predators, such as ants and wasps. Ambush carnivorous caterpillars (_Eupithecia_ spp.; Lepidoptera: Geometridae) provide a remarkable example of a feeding behaviour unique to the Hawaiian Islands. Their prey includes various arthropods species. _Eupithecia_ larvae even attack predatory arthropods such as parasitoids. However, it is unclear whether _Eupithecia_ can attack ants. Here, I examined whether _Eupithecia orichloris_ can attack the invasive ant _Pheidole megacephala_ under laboratory conditions. _Eupithecia orichloris_ could successfully attack the minor worker of _P. megacephala_. However, the major worker of _P. megacephala_... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/5374/version/1 |
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| Lindsay Reynolds; David Cooper. |
| Background/Question/Methods: Invasive species are increasingly problematic world-wide. Scientists working to understand why invasive species are successful must first understand the processes of invasion. Invasion facilitation and empty niche exploitation are key processes that have not been well-studied in species rich ecosystems such as riparian areas. In the southwestern United States (U.S.) two prominent invaders of riparian habitats are the exotic woody plant species tamarisk (Tamarix ramosissima, T. chinensis, and their hybrids) and Russian olive (Eleagnus angustifolia). These plants were introduced by humans throughout the southwest around 1900. Both tamarisk and Russian olive have invaded the ephemeral stream system in Canyon de Chelly National... |
| Tipo: Presentation |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3842/version/1 |
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| Erik E. Stange; Matthew P. Ayres. |
| Background/Question/Methods: A time series of Lepidoptera larvae (caterpillar) abundance and biomass in the northern hardwood forests of central New Hampshire, USA, shows large interannual fluctuations in aggregated caterpillar biomass (52-fold variation in mg caterpillars/ 8000 leaves) that were spatially correlated across a regional landscape. Primary production of these mature forests has not varied over this period, and many hundreds of Lepidoptera species share comparatively few host plants. Therefore, interannual changes in nutritional quality of even one host plant species may be capable of generating correlated population dynamics for many species in the Lepidoptera community. We tested the hypothesis that variation in soil nutrient availability... |
| Tipo: Presentation |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3859/version/1 |
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| SA, I. B.; SÁ, I. I. S.; SILVA, A. de S.; SILVA, D. F. da. |
| O Vale do Submédio São Francisco est· localizado na região sertaneja no oeste do Estado de Pernambuco e norte do Estado da Bahia, entre os paralelos 07? 0í00íí e 10? 301í00íí de Latitude Sul e entre os meridianos 37? 00í00íí e 41? 00í00íí de Longitude Oeste, com uma ·rea de 125.755 Km2 . Abrange municípios de dois estados do Nordeste brasileiro, conforme Tabela 1, incluindo as sub-bacias dos rios Paje ?, Tour„o e Vargem, alÈm da sub-bacia do Rio Moxotó, ultimo afluente da margem esquerda |
| Tipo: Capítulo em livro técnico (INFOTECA-E) |
Palavras-chave: Caracterização; Vale do São Francisco; Clima; Vegetação; Relevo; Caatinga; Rural development; Economic development; Ecology. |
| Ano: 2009 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/661912 |
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| RICHE, G. R.; MANTOVANI, L. E.. |
| Trata sobre o municipio de Carica (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe. |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Localizacao; Extensao; Sergipe; Carira; Relievo; Hydrography; Localization; Extension; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Climate; Ecology; Geology; Brazil; Population; Soil; Vegetation. |
| Ano: 1985 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133056 |
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| RICHE, G. R.; MANTOVANI, L. E.. |
| Trata sobre o municipio de Poco Redondo (SE): localizacao, extensao, populacao, clima, geologia, vegetacao, relevo, hidrografia, as unidades geo-ambientais, as grande unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe. |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Localizacao; Extensao; Sergipe; Poco Redondo; Relievo; Hydrography; Localization; Extension; Solo; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Ecology; Geology; Brazil; Population; Vegetation. |
| Ano: 1985 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133055 |
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| RICHE, G. R.; MANTOVANI, L. E.. |
| Trata sobre o Municipio de Ribeiropolis (SE). Traz a localizacao, extensao, populacao, clima, geologia, vegetacao, relevo , hidrografia, as unidades geo-ambientais, as grandes unidades de solos, os quadros agrario e agricola, recomendacoes e sugestoes complementares. Anexo: roteiro metodologico para o zoneamento geo-ambiental a nivel de municipio no Estado de Sergipe. |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Extensao; Localizacao; Sergipe; Ribeiropolis; Extension; Localization; Relievo; Hydrography; Solo; Clima; Ecologia; Geologia; Hidrografia; População; Relevo; Vegetação; Soil; Climate; Ecology; Geology; Brazil; Population; Vegetation. |
| Ano: 1985 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/133057 |
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| Registros recuperados: 900 | |
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