Evaluation of a Movie Theater Advertisement Campaign to Promote Behaviors that Prevent Spread of Aquatic Invasive Species     

Bret R. Shaw  Allison Howell  Ken Genskow 《社会与自然资源》2014,27(7):768-776

One of the primary causes of the spread of aquatic invasive species (AIS) is boaters and anglers who move between bodies of water. Engaging with recreational boaters and anglers to encourage preventative behaviors is crucial for managing the spread of AIS. The use of cinema advertising for disseminating pro-environmental messages is a relatively novel and understudied outreach strategy. To explore this approach, an AIS-related public service announcement was placed in the preshow advertising at a movie theater in north central Wisconsin. Movie patrons were surveyed as they left the theater to determine demographic, AIS awareness, advertising exposure, and recall information. The results of this study suggest movie theater advertising is a potentially efficacious medium for pro-environmental outreach efforts.  相似文献   

Detecting subcanopy invasive plant species in tropical rainforest by integrating optical and microwave (InSAR/PolInSAR) remote sensing data,and a decision tree algorithm     

《ISPRS Journal of Photogrammetry and Remote Sensing》2014

In this paper, we propose a decision tree algorithm to characterize spatial extent and spectral features of invasive plant species (i.e., guava, Madagascar cardamom, and Molucca raspberry) in tropical rainforests by integrating datasets from passive and active remote sensing sensors. The decision tree algorithm is based on a number of input variables including matching score and infeasibility images from Mixture Tuned Matched Filtering (MTMF), land-cover maps, tree height information derived from high resolution stereo imagery, polarimetric feature images, Radar Forest Degradation Index (RFDI), polarimetric and InSAR coherence and phase difference images. Spatial distributions of the study organisms are mapped using pixel-based Winner-Takes-All (WTA) algorithm, object oriented feature extraction, spectral unmixing, and compared with the newly developed decision tree approach. Our results show that the InSAR phase difference and PolInSAR HH–VV coherence images of L-band PALSAR data are the most important variables following the MTMF outputs in mapping subcanopy invasive plant species in tropical rainforest. We also show that the three types of invasive plants alone occupy about 17.6% of the Betampona Nature Reserve (BNR) while mixed forest, shrubland and grassland areas are summed to 11.9% of the reserve. This work presents the first systematic attempt to evaluate forest degradation, habitat quality and invasive plant statistics in the BNR, and provides significant insights as to management strategies for the control of invasive plants and conversation in the reserve.  相似文献   

五种红树植物原位根系小分子多酚组成及含量分析     

刘玉  洪泽珊  彭逸生  徐健荣 《海洋与湖沼》2015,46(5):1046-1051

红树植物的化感作用和生态功能与其多酚类物质的组成和含量密切相关,其植物根系中含有的小分子多酚对红树植物对根际生物群落的调控具有重要的意义,但对其根系中具体含有的多酚类最小单体尚缺少科学实验证据。对湛江红树林国家级自然保护区内五种重要建群红树植物进行原位根系采样,采用液相高效色谱法(HPLC)对5种主要的小分子多酚单体进行定性和定量分析。主要结果为:五种红树根系内均检测出5种小分子多酚单体,浓度含量范围在0.0007—1.7424 mg/g DW。红树植物单株含量最高值分别为,儿茶素1.7424 mg/g DW,棓儿茶素1.1470 mg/g DW,表棓儿茶素0.4457 mg/g DW,没食子酸0.2374 mg/g DW,表儿茶素0.3331 mg/g DW。5种小分子多酚含量的总平均值以秋茄(Kandelia candel)和低潮带桐花树(Aegiceras corniculatum)最高,分别为0.2778 mg/g DW、0.2379 mg/g DW。木榄(Bruguiera gymnorrhiza)和无瓣海桑(Sonneratia apetala)次之,依次为0.0766 mg/g DW、0.0734 mg/g DW。红海榄(Rhizophora stylosa)和高潮带桐花树(A.corniculatum)相对最低,分别为0.0488 mg/g DW、0.0341 mg/g DW。  相似文献   

我国滨海火电和核电的分布现状及空间发展过程     

林杰  黄发明 《海洋通报》2022,(6)

近年来,我国越来越多的火电和核电电厂建设在滨海区域。文章概述了我国滨海电厂（包括火电和核电）的地理分布、热量排放和单机容量现状,回顾了近30年滨海电厂的空间发展过程。研究结果表明：我国滨海电厂分布不均,主要集中在广东省、浙江省和福建省。相同装机容量下,滨海核电设计排放热量比滨海火电设计排放热量多58%。滨海火电平均单机容量远远大于全国火电。20世纪90年代,我国滨海电厂主要分布在河口和海湾附近;截至2020年,滨海电厂在海湾、开放海域和河口装机容量的分布比例约为7:2:1。从尽量减少对海洋生态环境影响的角度考虑,位于河口的滨海电厂应开展电力结构调整;在保障建设运营安全的前提下,滨海电厂,特别是滨海核电应尽量选址在开放海域。  相似文献   

利用市政污水厂尾水培养产油微藻——营养盐去除与生物质生产     

李大伟  孟范平  崔鸿武 《中国海洋大学学报(自然科学版)》2022,52(2):94-103

将1株产油淡水微藻——微拟球藻(Nannochloropsis sp.MASCC 11)分别接种到青岛市2家市政污水处理厂(STP)的尾水中,根据其生长、油脂产率和营养盐去除情况,评价了利用STP尾水培养微藻以生产富油的藻生物质同时深度净化尾水的可行性。结果表明,团岛污水处理厂(TD-STP)和李村河污水处理厂(LC-STP)尾水中无机氮和磷酸盐的浓度虽然远低于BG11培养基,但仍能支持微藻生长,而且以未经稀释的尾水更具优势,培养8 d后,藻生物量分别达到BG11培养基中生长微藻的65.23%和44.77%。STP尾水经稀释后处于营养盐缺乏状态,有利于藻细胞内脂质积累,但是油脂产率最大值(10.5 mg·L^-1·d^-1)仍出现在未经稀释的TD-STP尾水中,为未稀释LC-STP尾水的1.37倍。LC-STP尾水中微藻的油脂产率较低,可能与该处理厂接纳工业废水而在尾水中残留较多有害物质有关。在微藻的直接和间接作用下,TD-STP和LC-STP尾水中磷酸盐的去除率分别达到94.5%和100%;无机氮的去除率较低(分别为59.2%和45.4%),与尾水中初始N/P较高有关。上述结果表明,与接纳工业废水的污水厂相比,处理生活污水的污水厂所排尾水较适于培养产油微藻,能够实现产油微藻低耗培养与尾水深度净化相耦合。  相似文献   

贵州典型喀斯特流域土地利用空间格局及水文干旱研究          下载免费PDF全文

贺中华  陈晓翔  梁虹  黄法苏  赵芳 《水文》2014,34(1):20-25

干旱是全球性普遍发生的一种自然现象,而喀斯特干旱不能简单归因于"气候异常、降水量减少"。在贵州省选择40个典型流域为研究样区,利用面向对象分类技术,构建土壤水体指数(SWBI),提取土地利用类型的遥感信息;借用景观指数计算软件(Fragstats4.0),计算土地利用类型的景观密度指数(PD)、最大斑块指数(LPI)、形状指数(SI)、景观分维指数(FDI),分析土地利用类型的空间分布格局;探讨不同土地利用格局下的流域储水空间的变化、流域地表储水能力的大小,研究土地利用类型及其空间分布变化对水文干旱的影响。研究表明:①疏林、旱地和灌木林分布相对集中、空间分布变化较大,水体和城镇分布相对分散、空间分布变化较小;②土地利用类型的斑块密度分布及最大斑块分布对水文干旱影响较大,土地利用类型的斑块边界分布及斑块形状分布对水文干旱影响较小;③土地利用类型的斑块密度指数、最大斑块指数、斑块形状指数及斑块分维指数越大,则土地利用类型对水文干旱影响越小。  相似文献   

The evapotranspiration and environmental controls of typical underlying surfaces on the Qinghai-Tibetan Plateau     

JinLei Chen  Jun Wen  ShiChang Kang  XianHong Meng  XianYu Yang 《寒旱区科学》2021,13(1):53-61

To reveal the characteristics of evapotranspiration and environmental control factors of typical underlying surfaces(alpine wetland and alpine meadow)on the Qinghai-Tibetan Plateau,a comprehensive study was performed via in situ observations and remote sensing data in the growing season and non-growing season.Evapotranspiration was positively correlated with precipitation,the decoupling coefficient,and the enhanced vegetation index,but was energy-limited and mainly controlled by the vapor pressure deficit and solar radiation at an annual scale and growing season scale,respectively.Compared with the non-growing season,monthly evapotranspiration,equilibrium evaporation,and decoupling coefficient were greater in the growing season due to lower vegetation resistance and considerable precipitation.However,these factors were restricted in the alpine meadow.The decoupling factor was more sensitive to changes of conductance in the alpine wetland.This study is of great significance for understanding hydro-meteorological processes on the Qinghai-Tibetan Plateau.  相似文献   

中新经济走廊地质矿产特征及找矿潜力   总被引：1，自引：0，他引：1  

施美凤  林方成  朱华平  王宏  邓奇 《地质通报》2017,36(1):16-34

中新经济走廊纵贯东南亚中南半岛,地处全球著名的特提斯成矿域,矿产资源丰富,但资源勘查开发水平滞后,成为中国"一带一路"战略实施的优选地区之一。该区一大批矿床的发现和一系列新矿山的陆续建成投产,必将为区域经济发展和社会进步注入新的活力。通过对中新经济走廊的大型或代表性矿床的地质特征和成矿背景的总结,并对研究区主要矿床的成矿作用、成矿模式及找矿潜力进行讨论,旨在提高对中新经济走廊矿产资源重要性的认识水平,进而为实施"一带一路"战略在东南亚地区的工作部署提供科学依据。  相似文献   

我国滨海核电站防护工程设计标准研究     

刘德辅  史宏达  刘桂林  王风清 《海洋工程》2017,35(4):135-146

面对全球极端气候频发的趋势,国内外核电站海岸防护工程普遍采用"可能最大台风暴潮"、"设计基准洪水"等具有含混性的规定作为确定防灾设计标准的依据,其内涵的各种不确定性因素必然会对防灾决策带来重大的致灾隐患。按照国务院核电站安全规划(2011-2020)提出的"必须按照全球最高安全要求",全面开展滨海核电站防护工程设计标准研究己势在必行。使用多维复合极值分布理论及双层嵌套多目标联合概率模式,将核电站水文与气象的研究标准合二为一,对IAEA及我国滨海核电站防护工程设计标准进行了风险评估,供有关部门参考。  相似文献   

佳木斯市水资源精测评价中需用水系统若干参数的确定     

李滨江  郭姚生 《水文》1999,(2):23-29

根据佳木斯市城市水资源和典型调查的大量数据,论述了城市工业、农业和生活需用水系统用水的确定方法,给出了若干参数,为城市需水系统分析及水资源管理提供了科学依据。  相似文献