搜索结果: 1-14 共查到“林学 birds”相关记录14条 . 查询时间(0.078 秒)
A new study by scientists at the Cornell Lab of Ornithology and other institutions confirms that most birds -- but not all -- synchronize their migratory movements with seasonal changes in v...
Do Coarser Gap Mosaics in Conifer Plantations Induce More Seed Dispersal by Birds? Temporal Changes during 12 Years after Gap Creation
seed dispersal bird-dispersed seed conifer plantation gap mosaic temporal change
2024/2/28
The creation of canopy gaps is thought to be an efficient silvicultural operation to diversify species composition of monoculture conifer plantations; however, the shortage of regeneration materials i...
Phoenix is losing birds, but homeowners' plants offer habitat for avian desert-dwellers（图）
Phoenix losing birds homeowners plants habitat avian desert-dwellers
2019/11/22
Find related stories on NSF's Long-Term Ecological Research Program at this link.Ecologists have long wondered about the impact of urbanization on bird biodiversity. Are cities with higher avian biodi...
Consequences of Fragmentation of Tropical Moist Forest for Birds and Their Role in Predation of Herbivorous Insects
avian diversity caterpillar predation fragmentation herbivory
2015/11/13
The consequences of habitat alteration on the role of understory insectivorous birds as predators of herbivorous insects in tropical forests are poorly understood. To examine whether fragmentation may...
Quantitative and qualitative damage caused by mammals and birds to the planting and natural seeding
woody plants damage mammals birds
2015/1/29
In the years 1999–2000, I studied damage to transplants in the planting and wildlings in the natural seeding at the locality Zamrlô in the Starohorské vrchy Mts. (750–1,000 m a.s.l., NE exposure,...
Seed Dispersal by Frugivorous Birds in a Coniferous Plantation
mixed conifer/broad-leaved forest frugivorous bird Japanese cedar plantation seed dispersal seed rain
2009/8/28
In order to evaluate the role of frugivorous birds in the dispersal of broad-leaved tree seeds in a plantation of Japanese cedar, Cryptomeria japonica D. Don, we monitored seed rain with 120 seed trap...
Mitigating Effects of Broadleaved Forest Fragmentation on Birds:Proposal of Plantation Matrix Management
habitat loss landscape ecology patch area stand composition stand structure
2009/8/27
I reviewed the effects on forest birds of replacing broadleaved forests at the patch and landscape levels, with emphasis on replacement by plantations. I proposed methods mitigating such effects. Redu...
Distribution and abundance of birds relative to elevation and biogeoclimatic zones in coastal old-growth forests in southern British Columbia
Distribution abundance of birds elevation biogeoclimatic zones coastal old-growth forests British Columbia
2009/2/11
This study examined birds and their association with forest structure and elevation in 1992 and 1993. The research sites were located in old-growth forest stands (251+ years) distributed between 400 a...
Observations on the use of stubs by wild birds：A 10-year update
Observations stubs wild birds
2009/2/11
In British Columbia, many species of wildlife depend on dead or dying trees; however, current Workers?Compensation Board regulations require that such trees be felled. In 1990, in an effort to reconci...
S39-5 Ecological forestry, old growth, and birds in the longleaf pine (Pinus palustris) ecosystem
2007/12/12
S30-4 The effects of coastal shrimp farming on birds in Indian mangrove forests and tidal flats
2007/12/12
Killing two birds with one stone: Transferring knowledge to fight poverty and land degradation（图）
gum arabic land
2007/3/28
Rome, 5 March 2007 - With help from FAO, farmers in six sub-Saharan countries have been able to increase their income from the sale of gums and resins and to restore degraded land.