Results 31 to 40 of about 56,474 (245)

泉州半月湾海滩侵蚀机制及修复对策研究

open access: yesHaiyang yu huzhao
本文通过对比半月湾海滩历史岸线、剖面、水下地形、沿岸输沙等的变化,详细分析了海滩的侵蚀现状,探讨了渔港防波堤建设对半月湾海滩侵蚀的动力机制,并针对性地提出了海滩修复思路。研究结果表明,半月湾海滩自渔港防波堤建设以来产生了自西向东的沿岸净输沙,海滩西侧持续侵蚀,东侧持续淤积;2004~2014年西侧岸线蚀退速率最大约为-8.10 m/a,东侧淤进速率最大约为10.10 m/a;2015~2017年年单宽净侵蚀量最大约为10.99 m3/m,2017~2021年单宽净淤积量最大约为26.05 m3/m;岸线、
姜 敏   +8 more
doaj   +1 more source

Comparison of photosynthetic characteristics and chlorophyll fluorescence parameters of Juglans cathayensis var. formosana in different habitats(不同生境华东野核桃光合生理特性及叶绿素荧光参数比较)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2013
采用LI-6400便携式光合作用系统,于2011年7月下旬的晴朗天气条件下,对浙江省天台山林窗、林缘、林下生境华东野核桃(Juglans cathayensis var. formosana)的光合生理特性及叶绿素荧光参数进行测定,并比较林窗生境中华东野核桃与其伴生植物山胡椒(Lindera glauca )、玉兰(Magnolia denudata)、云锦杜鹃(Rhododendron fortunei)光合日进程的差异.结果表明:夏季,林窗生境的华东野核桃及主要伴生植物叶片的净光合速率(Pn ...
LIYue-ling(李月灵)   +3 more
doaj   +1 more source

Effect Assessment of Marine Ecological Restoration:A Case Study of Sansha Bay [PDF]

open access: yes, 2016
由于人类对海洋资源的无序开发,海洋生态系统面临着环境恶化、结构失调、功能衰退等诸多问题,并逐渐制约海洋的可持续发展。海洋生态修复作为当前缓解生态系统退化压力、恢复受损生态系统结构功能的重要手段,是海洋生态系统管理的核心内容之一。但目前针对海洋生态修复的研究大多以针对单一生境的修复技术措施为主,缺乏对海洋生态系统各组分综合修复的系统研究,对如何评判海洋生态系统修复的效果,更是关注甚少。科学合理的对海洋生态修复实践进行评价,可以及时掌握生态系统对人工修复的响应和反馈 ...
李倨莹
core  

Urban adults' engagement in nature education and its interplay with everyday lived experiences: A case study from Shenzhen, China

open access: yesPeople and Nature, EarlyView.
Abstract Currently, scholarship on education to foster connectedness with nature primarily focuses on children. As adults likewise face the disconnection from nature and play a key role in influencing children, it is important to understand how they perceive, engage in, and benefit from relevant programmes.
Xiaoxue Chen, Zuyi Lyu, Junxi Qian
wiley   +1 more source

The Cultural Ecology and Non-material Cultural Heritage Protection:Taking Mu Dong Folk Songs as an Example [PDF]

open access: yes, 2016
口头与非物质文化不可再生,一旦走向消亡,就永远无法恢复。随着经济全球化与现代生活方式的转变,口头与非物质文化遗产日渐式微,受到全社会的广泛关注,但是,在国家政策保护下的口头与非物质文化遗产亦因文化生态环境的改变而发生变形、退化与萎缩。基于此,本文指出,对非物质文化遗产保护的最根本问题是从文化生态的角度保护其原生态性的文化生态环境。 文化生态是借用生态科学的概念、理论、观点和方法研究文化现象的理论,主要研究人类文化与其所处环境之间的密切关系,这里所说的环境不仅指自然环境,同时也包括文化环境 ...
康杨微
core  

Surface Sulfate Modification Promoted Excitons Extraction of BiOBr Nanosheets for Efficient 1O2 Photosynthesis and Chlorophenols Dechlorination

open access: yesRare Metals, EarlyView.
ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi   +8 more
wiley   +1 more source

The discussion of ecological building in Kaihua County located in the beginning of Qiangtang River(钱塘江源头开化县生态建设探讨)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2000
钱塘江源头城市开化县复杂的地貌形态及多样的山地小气候孕育了丰富多样的生物资源.根据生态环境现状,提出了突出生物多样性保护、加强生态林业、生态工业、生态农业、生态城镇、生态旅游业等生态建设的思路.
HUANGJing-ru(黄瑾如)
doaj   +1 more source

Developing ecosystem service indicators: experiences and lessons learned from sub-global assessments and other initiatives [PDF]

open access: yes, 2011
People depend upon ecosystems to supply a range of services necessary for their survival and well-being. Ecosystem service indicators are critical for knowing whether or not these essential services are being maintained and used in a sustainable manner ...
Armenteras, Dolors   +57 more
core   +1 more source

Lipid Nanoparticles Delivering ClpP‐mRNA Suppress Pyroptosis and Senescence in Intervertebral Disc Degeneration via mTOR/BNIP3‐Activated Mitophagy

open access: yesRare Metals, EarlyView.
ABSTRACT Intervertebral disc degeneration (IDD) is a predominant cause of low back pain, significantly impacting quality of life. Mitochondrial fitness is essential in the progression of IDD, as it regulates cellular senescence and pyroptosis. This study investigates the role of mitochondrial caseinolytic protease P (ClpP) in alleviating senescence and
Kun Wang   +7 more
wiley   +1 more source

Characteristics of chemical compositions and sources of PM2.5 in winter at Lin′an(杭州市临安区冬季PM2.5化学组成特征和来源解析)

open access: yesZhejiang Daxue xuebao. Lixue ban
In order to study the pollution characteristics and source contributions of PM2.5 at Lin'an, located in Hangzhou City, the PM2.5 component online monitoring was conducted from December 23, 2021, to February 28, 2022, and the sources apportionment of PM2 ...
马勤(MA Qin), 许振波(XU Zhenbo)
doaj   +1 more source

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