基于火强度的西山国家森林公园主要可燃物类型划分

通过外业调查和室内测定,获得西山国家森林公园主要可燃物的相关参数,输入BehavePlus模型,得到潜在火行为参数,以火强度大小为主要指标划分主要可燃物类型,结果表明:在坡度分别为25°和35°情形下,高强度火的林分为地盘松林、麻栎林和云南油杉林,中强度火的林分是华山松林和滇青冈林,低强度火的林分只有旱冬瓜林。研究结果可合理划分火险等级,实施科学的火管理。     

广州起义烈士陵园四季观花植物种类及景观浅析

通过对广州起义烈士陵园内观花植物种类、盛花期、花色、各季节观赏效果近两年的实地调查分析,得出:种类约有91种,其中春季33种,夏季37种,秋季11种,冬季10种;红色系和白色系为主色调,分别为36种和29种,各占总数的39.6%和31.9%。探讨了如何使公园各季节主题花鲜明的前提下具有季相性、连续性、多样性,以期为今后园内建设和改造提供参考。     

东莞国家城市湿地公园植物生态化管理与利用研究

东莞国家城市湿地公园是人工修复重建型湿地的典型代表。针对湿地公园内植物构建成效,在实地调查和查找文献资料的基础上,分析湿地公园内植物的类型、分布以及植物构建现状和存在的问题,提出了湿地公园植物生态化管理与利用的对策建议。     

Should I stay or should I go? Fishers’ ability and willingness to adapt to environmental change in Cambodia's Tonle Sap Lake

The livelihoods of people dependent on the Tonle Sap floodplain ecosystem in Cambodia are expected to be affected by changes in economic conditions, social circumstances, environmental perturbations, demographic shifts and political climates. This study assesses how small‐scale fisheries’ livelihoods are changing in response to social and environmental conditions using the opinions of fishers collected through an intensive family survey of 514 households from Pursat and Battambang Provinces in Cambodia. Probit modelling approach was used to assess whether a fisher would continue fishing or not in the future when subjected to a variety of shifting conditions and identify the factors associated with their response. It was found that in any future condition about 50% of fishers would likely continue to fish, which suggests how much they love their traditional livelihood of fishing. The remaining 50% considered to diversify their livelihood strategy by shifting towards a combination of fishing, farming, and off‐farm jobs. Furthermore, the analysis found that the fishers will change their fishing practices depending on how other sectors in the region develop. The model showed increasing access to agricultural activities decreased the likelihood of continuing to fish, whereas finding an off‐farm job corresponded to increased likelihood of continuing to fish.     

The neglected role of religion in fisheries management

Religion and spirituality have long played important roles in fishery systems around the world, and yet are often neglected in modern fisheries management and research. We review current literature and analyse the major small‐scale fishery on Lake Tanganyika, Africa, to highlight how religion may mediate fishing behaviours. Our study surveyed 154 fishers across 11 landing sites in Tanzania, followed by 15 semi‐structured interviews with key informants including fishery officers and local religious leaders. We identified key connections between religious beliefs/practices and fisher perceptions, behaviour and compliance with harvest restrictions and regulations. We demonstrate that better understanding and accounting for religious dimensions is critical for engaging with fishery stakeholders more effectively and managing global fisheries more sustainably.     

青海湖高寒沙区引进辽西樟子松治沙研究

通过引进东北辽西科尔沁沙地樟子松在青海湖斜麻沙区进行栽植试验,结果表明,引进的樟子松当年主顶芽平均生长高度达10.13 cm,侧顶芽生长高度平均达5.14 cm,平均顶芽生长达7.64 cm,苗木整体生长良好,当年成活率达到93%;经过长达6个多月寒冬,越冬成活率达80%,返青良好。     

广州市儿童公园中植物科普教育类活动项目研究

通过研究广州市13个儿童公园中植物科普教育类活动项目的类型、管理形式、使用状况和使用评价,并结合广州家长及儿童对植物科普教育活动项目的偏好与需求调研结果分析,探讨该类型活动的组织模式和开展方式,总结成功的经验及存在的问题,提出丰富植物资源、规划科普场地、增加活动项目、完善公园管理、培训科普人员等完善建议。     

Pansteatitis in polluted Olifants River impoundments: nutritional perspectives on fish in a eutrophic lake,Lake Loskop,South Africa

This study compares the aetiology of pansteatitis in Lake Loskop, relative to two other impoundments along the Olifants River. Macroscopic and microscopic pathology, age determination and analysis of stomach content, fatty acids and stable isotopes explain the high prevalence of pansteatitis in Oreochromis mossambicus (Peters) and several other species in Lake Loskop. All the dietary indicator comparisons between pansteatitis‐affected and healthy fish fail to support a systemic cause. Pansteatitis in Lake Loskop was linked to size and weight of O. mossambicus, but not to ontogenic age. Fish in Lake Loskop showed abnormally high omega‐3 to omega‐6 fatty acid ratios normally only found in marine fish with no significant difference in degree of assimilation of these fatty acids between pansteatitis‐affected and healthy fish. This explains the vulnerability to, but not the occurrence of, pansteatitis. As a cause for the pansteatitis, these results point towards sporadic vitamin E‐depleting trigger events, known sporadic fish die‐off occurrences that provide surviving fish with a rich source of rancid fats on which to scavenge. The mechanism ties pansteatitis to eutrophication and trophic cascade effects, the intrinsic drivers of the disease and suggests an adaptive management strategy that might be applied by relevant conservation authorities.     

江西梅岭国家森林公园古树名木的分布特征

古树名木是自然界和前人留下的珍贵遗产和宝贵的林木种质资源。本文以每木调查法对江西梅岭国家森林公园内的古树名木的分布特征开展调查。结果表明:在水平分布上,古树名木分布于生态环境较好的罗亭镇和太平镇,占61.40%;在垂直分布上,海拔200 m以下分布居多,达68.38%。以香樟为例:发现海拔高度与树高呈明显正相关,与胸径呈明显负相关,与冠径和树龄呈负相关但不显著;在生境分布上,以村旁和林地居多,占67.28%;在地形分布上,分布于平坡、阳坡以及平地,分别占37.50%、90.44%和43.38%;在集群分布上,以散生为主,占83.46%。这些结果为该区域后续的古树名木资源保护提供可靠的信息资料。     

宝鸡金渭湖湿地小气候效应初探

以宝鸡市金渭湖湿地为研究对象,在金渭湖拦河闸桥附近进行气象及大气颗粒物观测,将拦河闸桥看作湿区,公路旁看作干区,对比分析湿地小气候特征的结果表明:宝鸡市金渭湖湿地具有明显的降温增湿作用,距离湿区越远,温度越高,相对湿度越低;冬季的相对湿度大于夏季,冬夏季的湿区温度始终低于干区,干湿两区的温度和相对湿度的日变化规律基本一致;湿区的PM2.5质量浓度小于干区,最多可小47%,表明金渭湖湿地对局地大气环境中的细颗粒物质量浓度具有显著削减作用。