共查询到18条相似文献，搜索用时 546 毫秒
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水库库滨带植被配置模式探讨 总被引：2，自引：0，他引：2
指出了水库库滨带植被具有涵养水源、净化水质、保持水土、美化环境的生态效益,水库库滨带植被的选择应遵循因地制宜、乡土植物为主、合理搭配的原则,以实现库滨带植被生态功能的最大化。 相似文献
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松华坝水库水源保护区的生态修复技术 总被引：3，自引：0，他引：3
松花坝水库库容2.19亿m3,每年向昆明供水1.2亿m3,但是松花坝水库水质下降趋势日益严重。文章从生态修复技术方面提出了需要采取的措施:①水土保持生态修复:保护森林、退耕还林、工程造林;②恢复上游河涧绿色廊道;③加强前置库容谷昌坝水库对污染物的拦截净化作用;④建立生态堤岸和水生植被缓冲带。 相似文献
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以长沙市圭塘河的滨水景观作为研究对象,从景观生态、服务管理和社会文化3个方面来对滨水景观作综合评价。运用层次分析法(AHP)确定各指标的权重,再利用语义差异法(SD)整体分析并发放调查问卷获得使用者们评价的基本数据。结果表明,准则层分值由高到低依次是景观生态、服务给管理和社会文化;在18个指标层因子中,主要影响滨水景观的重要因子有河流水质、滨水植被、驳岸设计和植物保护,该圭塘河滨水景观最终评分67.68分,评价为一般满意。对圭塘河当地的特色文化的表现程度和公共设施的建设有待加强,滨水步道应优化建设。 相似文献
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水源涵养林水文生态效应研究进展 总被引：9，自引：1，他引：8
水源涵养林是具有特殊意义的防护林种,具有很好的涵养水源、保持水土、净化水质等功能。从森林植被对水量、径流泥沙和水质的影响等方面介绍了国内外水源涵养林水文生态效应的研究进展。从各国的研究成果来看,普遍认为森林覆盖率的减少可以增加流域产水量;森林植被可以减少径流泥沙含量并能有效改善溪流水质状况。 相似文献
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The creation of riparian forest buffer zones for water quality management in agricultural landscapes takes land out of production,
incurring an economic loss for the landowner. However, planting and harvesting techniques, such as those employed in indigenous
systems of tropical agroforestry, can enhance riparian forest buffer strips with economically viable species. This kind of
riparian forest buffer can be harvested and generate income from otherwise unproductive tracts of land. This practice would
make the implementation of riparian forest buffers more acceptable to farmers, by generating income while helping to improve
water quality. The present project provides an economic model for the harvest of non-timber products (fruits, nuts and ornamentals)
from riparian forest buffer zones in the Chesapeake Bay region. Potential gross income from harvest is calculated to demonstrate
the feasibility of this strategy. Given certain assumptions, the gross income can amount to $60,934.30/ha/year.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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Understory plant biomass, species richness and canopy openness were measured in six-year old hybrid poplar riparian buffer
strips, in the understory of two unrelated clones (MxB-915311 and DxN-3570), planted along headwater streams at three pasture
sites of southern Quebec. Canopy openness was an important factor affecting understory biomass in hybrid poplar buffers, with
lower understory biomass observed on sites and under the clone with lower canopy openness. Although tree size was an important
factor affecting canopy openness, relationships between total stem volume and canopy openness, for each clone, also support
the hypothesis of a clonal effect on canopy openness. Understory biomass and canopy openness as low as 3.6 g m−2 and 7.6% in 1 m2 microplots were measured under clone MxB-915311 at the most productive site. This reduction of understory plant growth could
compromise important buffer functions for water quality protection (runoff control, sediment trapping and surface soil stabilisation),
particularly were concentrated runoff flow paths enter the buffer. On the other hand, tree buffers that maintain relatively
low canopy openness could be interesting to promote native and wetland plant diversity. Significant positive relationships
between canopy openness and introduced species richness (R
2 = 0.46, p < 0.001) and cover (R
2 = 0.51, p < 0.001) were obtained, while no significant relationship was observed between canopy openness and native (wetland) species
richness and cover. These results suggest that planting riparian buffer strips of fast-growing trees can rapidly lead to the
exclusion of shade-intolerant introduced species, typical colonisers of disturbed habitats such as riparian areas of pastures,
while having no significant effect on native (wetland) diversity. Forest canopy created by the poplars was probably an important
physical barrier controlling introduced plant richness and abundance in agricultural riparian corridors. A strong linear relationship
(R
2 = 0.73) between mean total species richness and mean introduced species richness was also observed, supporting the hypothesis
that the richest communities are the most invaded by introduced species, possibly because of higher canopy openness, as seen
at the least productive site (low poplar growth). Finally, results of this study highlight the need for a better understanding
of relationships between tree growth, canopy openness, understory biomass and plant diversity in narrow strips of planted
trees. This would be useful in designing multifunctional riparian buffer systems in agricultural landscapes. 相似文献
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Matthew R. Kluber Deanna H. Olson Klaus J. Puettmann 《Forest Ecology and Management》2008,256(4):529-535
Over the past 50 years, forested landscapes of the Pacific Northwest have become increasingly patchy, dominated by early successional forests. Several amphibian species associated with forested headwater systems have emerged as management concerns, especially after clearcutting. Given that headwater streams comprise a large portion of the length of flowing waterways in western Oregon forests, there is a need to better understand how forest management affects headwater forest taxa and their habitats. Mitigation strategies include alternatives to clearcutting, such as harvests that remove only part of the canopy and maintenance of riparian buffer strips. Our study investigates effects of upland forest thinning coupled with riparian buffer treatments on riparian and upland headwater forest amphibians, habitat attributes, and species-habitat associations. Amphibian captures and habitat variables were examined 5–6 years post-thinning within forest stands subject to streamside-retention buffers and variable-width buffers, as well as unthinned reference stands. We found no treatments effects, however, our results suggest that ground surface conditions (e.g., amount of rocky or fine substrate) play a role in determining the response of riparian and upland amphibians to forest thinning along headwater streams. Distance from stream was associated with amphibian abundance, hence retention of riparian buffers is likely important in maintaining microclimates and microhabitats needed for amphibians and other taxa. Moderate thinning and preservation of conditions in riparian and nearby upland areas by way of variable-width and streamside-retention buffers may be sufficient to maintain suitable habitat and microclimatic conditions vital to amphibian assemblages in managed headwater forests. 相似文献
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Chad M. Kooistra Cassandra Moseley Heidi Huber-Stearns Stacy Rosenberg 《Journal of Sustainable Forestry》2018,37(1):56-76
Research about nonindustrial private forest (NIPF) landowners’ perspectives on voluntary conservation-based programs continues to proliferate. However, there is a gap in understanding NIPF landowner perspectives about the social and ecological outcomes of mandatory conservation-based regulations. We sent questionnaires to Oregon NIPF landowners to understand their beliefs about potential outcomes of proposed state regulations that strengthen mandatory riparian buffer habitat protection requirements. Factor analysis and multiple regression techniques revealed the most important variables that influence those beliefs. Overall, respondents believed that the socioeconomic outcomes were negative and the ecological outcomes were neutral or slightly positive. Respondents with more conservative political attitudes who owned larger properties were more likely to believe that the outcomes would be negative. As the importance of maintaining property for future generations and increasing timber productivity increased, respondents believed the potential outcomes would be increasingly negative. As the importance of improving water quality, increasing carbon storage, and improving recreational use on the property increased, respondents believed that the outcomes would be increasingly positive. We discuss management and policy implications, including communication strategies aimed at engaging with NIPF landowners to highlight the purpose and potential outcomes of forest and riparian management regulations. 相似文献
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Nutrient Attenuation in Agricultural Surface Runoff by Riparian Buffer Zones in Southern Illinois,USA 总被引：1，自引：0，他引：1
Nutrients in overland flow from agricultural areas are a common cause of stream and lake water quality impairment. One method
of reducing excess nutrient runoff from non-point sources is to restore or enhance existing riparian areas as vegetative buffers.
A field scale study was conducted to assess the ability of remnant giant cane (Arundinaria gigantea (Walt.) Muhl.) and forest
riparian buffer zones to attenuate nutrients in agricultural surface runoff from natural precipitation events. Two adjacent,
10.0 m wide riparian buffers were instrumented with 16 overland flow collectors to monitor surface runoff for nitrate, ammonium,
and orthophosphate. Measurements were taken at 3.3 m increments within each buffer. The forest buffer significantly reduced
incoming dissolved nitrate-N, dissolved ammonium-N, total ammonium-N, and total orthophosphate masses in surface runoff by
97, 74, 68, and 78 , respectively within the 10.0 m riparian buffer. Nutrient reductions within the cane buffer were 100 for
all three nutrients due to relatively high infiltration rates. Significant reductions of total ammonium- N and total orthophosphate
were detected by 3.3 m in the cane buffer and at 6.6 m in the forest buffer. Results suggest that both giant cane and forest
vegetation are good candidates to incorporate into riparian buffer restoration designs for southern Illinois as well as in
other regions within their native range with similar climatic and physiographic conditions. 相似文献