搜索结果: 1-15 共查到“理学 forestry”相关记录16条 . 查询时间(0.078 秒)
Influences to Forest Fire Occurrence of Climate Change: A Study in Ta He Forestry Bureau in Great Xing’an Mountain
Climate Change Forest Fire Great Xing’an Mountain Julian Date Ta He
2011/12/16
Forest fire is one of the most important ecological factors in the forest ecosystem. The Daxinanling forest region has not only the largest forest areas, but also the biggest forest fire burned area i...
Effects to Forest Fire Occurrence of Climate Change in Ta He Forestry Bureau in Great Xing’an Mountain
Climate Change Forest Fire Great Xing’an Mountain Julian Date Ta He
2011/12/16
Forest fire is one of the most important ecological factors in the forest ecosystem. The Great Xing’an Mountain region has not only the largest forest areas, but also the biggest forest fire burned ar...
Benthic invertebrates in the headwaters of the Wye and Severn：effects of forestry and clear-felling
Benthic invertebrates clear-felling Wye forestry
2009/6/8
Invertebrate communities were recorded in three surveys between 1974 and 1994 of headwaters of the Wye and Severn at Plynlimon: the Afon Gwy (unforested), the Afon Hore (initially forested) and the A...
The effects of clear-felling established forestry on stream-flow losses from the Hore sub-catchment
Hore sub-catchment clear-felling stream-flow losses
2009/6/8
The effects on streamflow of clear-felling a substantial part of the established forestry within the Hore sub-catchment at Plynlimon were estimated by a regression comparison of pre-and post-felling r...
The impact of the growth of new plantation forestry on evaporation and streamflow in the Llanbrynmair catchments
Annual water balances streamflow plantation forestry evaporation
2009/6/8
Annual water balances (1983-1995) for the Cwm and Delyn catchments at Llanbrynmair Moor in mid-Wales have been used to quantify the hydrological effects of the land use change in the Cwm from moorland...
Assessing soil calcium depletion following growth and harvesting of Sitka spruce plantation forestry in the acid sensitive Welsh uplands
soil calcium depletion Welsh uplands plantation forestry
2009/6/5
A simple mass balance has been used to estimate soil calcium depletion during the growth of a 50 year old Sitka spruce crop on acid, base-poor peaty podzol soils in upland Wales. Growth of the crop wi...
Implications of changing from grazed or semi-natural vegetation to forestry for carbon stores and fluxes in upland organo-mineral soils in the UK
semi-natural vegetation carbon stores upland organo-mineral soils
2009/5/6
In the UK, as organo-mineral soils are a significant store of soil organic carbon (SOC), they may become increasingly favoured for the expansion of upland forestry. It is important, therefore, to asse...
The long-term water balance (1972–2004) of upland forestry and grassland at Plynlimon, mid-Wales
long-term water balance grassland upland forestry
2009/5/6
This paper reviews research into the hydrological impacts of UK upland forestry and updates the water balance of the Plynlimon research catchments for the period 1972–2004. Comparison of this network ...
Sustainability of UK forestry：contemporary issues for the protection of freshwaters, a conclusion
water quality forestry stream ecology acidification critical loads nutrients
2009/3/5
This paper closes the Special Issue of Hydrology and Earth System Sciences entitled "Sustainability of UK forestry: contemporary issues for the protection of freshwaters" by presenting conclusions fro...
The effects of riparian forestry on invertebrate drift and brown trout in upland streams of contrasting acidity
brown trout land-use acidification drift forestry streams
2009/3/5
Variations in macroinvertebrate drift and benthic invertebrate abundance were assessed in 30 upland Welsh streams of varying acidity (pH < 5.7 or pH.> 6.0) and riparian land-use (conifer, moorland or ...
Riparian forestry management and adult stream insects
microclimate plantation life history riparian vegetation
2009/3/5
The impacts of coniferous plantation forestry on the biology of upland streams in the UK are firmly established.
Impacts of forestry on nitrogen in upland and lowland catchments: a comparison of the River Severn at Plynlimon in mid-Wales and the Bedford Ouse in south-east England using the INCA Model
afforestation water quality nitrogen modelling land-use change Wales
2009/3/5
The impacts of afforestation at Plynlimon in the Severn catchment, mid-Wales, and in the Bedford Ouse catchment in south-east England are evaluated using the INCA model to simulate Nitrogen (N) fluxes...
The water quality functioning of the upper River Severn, Plynlimon, mid-Wales: issues of monitoring, process understanding and forestry
nutrients trace metals Plynlimon River Severn forestry fractals
2009/3/5
An overview of hydrochemical studies of the upper River Severn catchment in the Plynlimon region of mid-Wales, as linked to twenty years of research at CEH Wallingford, is presented. The work provides...
Forestry and the aquatic environment: studies in an Irish context
forest-stream interactions Irish plantation forestry macroinvertebrates forest management
2009/3/5
Research on the interaction between plantation forestry and aquatic environments is essential to develop environmentally compatible and sustainable management further
Continuous cover forestry: possible implications for surface water acidification in the UK uplands
acidification forestry continuous cover forestry clearfelling
2009/3/5
The effects of widespread conifer afforestation on the acidity of lakes and streams in the acid sensitive uplands of the UK has been researched extensively and has contributed to the development and i...