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Data from: Assessing spatial patterns of soil erosion in a high?latitude rangeland
- 负责人：
- DOI：
- doi:10.5061/dryad.z34tmpg8j
- 摘要：
- ee complementary datasets: 1) high?resolution UAV imagery collected from 12 sites (total area ~0.75?km2); 2) historical imagery of the same sites
Data from: Using drones and sirens to elicit avoidance behaviour in white rhinoceros as an anti-poaching tactic
- 负责人：
- Penny, Samuel
- DOI：
- doi:10.5061/dryad.tb21f30
- 摘要：
- at-risk rhinos away from areas of danger (e.g. near perimeter fences). To evaluate the efficacy of deterrents, we exposed a population of southern white
Data from: Drone?based structure?from?motion photogrammetry captures grassland sward height variability
- 负责人：
- DOI：
- doi:10.5061/dryad.2q8m903
- 摘要：
- and hydrology. Monitoring schemes are needed to quantify spatial changes in these multiple functions alongside ecosystem degradation. Sward height is wide
Data from: Allometric models to estimate leaf area for tropical African broadleaved forests
- 负责人：
- DOI：
- doi:10.5061/dryad.63cj030
- 摘要：
- Direct and semi-direct estimations of leaf area (LA) and leaf area index (LAI) are scarce in dense tropical forests despite the importance of such measurements to calibrate remote-sensing products, forest dynamics and biogeochemical models (e.g. Dynamic Global Vegetation Models). Extensive and destructive sampling of 61 trees belonging to 13 species spanning all diameter and wood density classes was performed in the semi-deciduous forest of southeastern Cameroon. For each tree, all leaves were weighed, counted for a subsample of branches and LA measured for 10-50 leaves. Allometric models were calibrated to allow semi-direct estimation at tree- and stand-levels, based on forest inventory data (R2=0.7, bias=21.2%, error=39.5%), also on novel tree metrics allowed by remote-sensing like airborne light detection and ranging (R2=0.63, bias=35.1%, error=58.73). Using twenty-one 1-ha forest inventory plots, stand-level estimations of LAI spanned from 4.42-13.99. Models produced at stand-level estimation may be considerably useful to climate-vegetation modelling and remote-sensing communities.
Data from: Fine-scale flight strategies of gulls in urban airflows indicate risk and reward in city living
- 负责人：
- DOI：
- doi:10.5061/dryad.87rc8
- 摘要：
- Birds modulate their flight paths in relation to regional and global airflows in order to reduce their travel costs. Birds should also respond to fine-scale airflows, although the incidence and value of this remains largely unknown. We resolved the three-dimensional trajectories of gulls flying along a built-up coastline, and used computational fluid dynamic models to examine how gulls reacted to airflows around buildings. Birds systematically altered their flight trajectories with wind conditions to exploit updraughts over features as small as a row of low-rise buildings. This provides the first evidence that human activities can change patterns of space-use in flying birds by altering the profitability of the airscape. At finer scales still, gulls varied their position to select a narrow range of updraught values, rather than exploiting the strongest updraughts available, and their precise positions were consistent with a strategy to increase their velocity control in gusty conditions. Ultimately, strategies such as these could help unmanned aerial vehicles negotiate complex airflows. Overall, airflows around fine-scale features have profound implications for flight control and energy use, and consideration of this could lead to a paradigm-shift in the way ecologists view the urban environment.
GBIF Occurrence Download
- 负责人：
- DOI：
- doi:10.15468/dl.j6etod
- 摘要：
- ) or Rhagoletis indifferens Curran, 1932 or Rhagoletis completa Cresson, 1929 or Rhagoletis meigenii (Loew, 1844) or Rhagoletis pomonella (Walsh, 1867) or Rhagoletis suav
GBIF Occurrence Download
- 负责人：
- DOI：
- doi:10.15468/dl.1haw9d
- 摘要：
- ) or Rhagoletis indifferens Curran, 1932 or Rhagoletis completa Cresson, 1929 or Rhagoletis meigenii (Loew, 1844) or Rhagoletis pomonella (Walsh, 1867) or Rhagoletis suav
Data from: Impact of hydromorphological pressures on the macrophytes bioindicators of the ecological water quality in Mediterranean rivers
- 负责人：
- DOI：
- doi:10.5061/dryad.q727ff4
- 摘要：
- One of the important tools to evaluate the ecological quality of surface water is the Macrophytes indices based on the bioindication capacity
Data from: The arrangement of lateral veins along the midvein of leaves is not related to leaf phyllotaxis
- 负责人：
- DOI：
- doi:10.5061/dryad.p6g8048
- 摘要：
- Positions of leaves along a stem usually adhere to a genetically determined, species-specific pattern known as a leaf phyllotaxis. We investigated
Data from: A cost-and-time effective procedure to develop SNP markers for multiple species: a support for community genetics
- 负责人：
- DOI：
- doi:10.5061/dryad.2b6b43k
- 摘要：
- to isolate ~100?500 high?quality SNP markers for each species that could be genotyped through classical PCR amplification methods. To assess the qua
