Pub Date : 2024-08-08DOI: 10.3897/natureconservation.56.111745
Gen Ito, Naoto Koyama, Ryota Noguchi, Ryoichi Tabata, Seigo Kawase, J. Kitamura, Yasunori Koya
We examined the genetic population structure of the endangered freshwater cyprinid Acheilognathus tabira tabira in the Japanese archipelago, which has only been analyzed in limited sampling in previous studies, based on cytochrome b region of the mitochondrial gene. We confirmed the existence of the same three lineages determined in the previous study, the natural distribution area of Lineage I and II+III were considered to be the Seto Inland Sea and Ise Bay regions, respectively. Furthermore, the Seto Inland Sea region population was divided into five groups inhabiting neighboring water systems using the spatial analysis of molecular variance (SAMOVA). We estimated that populations in the Seto Inland Sea region migrated through a single paleowater system during the last glacial period and were then separated and genetically differentiated due to marine transgression. The Yoshino River system population was estimated to be a non-native population because it belonged to the same group as the Lake Biwa-Yodo River system, which is the only separate water system across the Seto Inland Sea. This study provides new evidence of genetic differentiation in A. t. tabira populations within the Seto Inland Sea region, where genetic differentiation has not been detected in previous studies, corresponding to five different groups by significantly increasing the number of individuals and sites compared with previous studies. Therefore, we propose these five groups as conservation units in the Seto Inland Sea region.
我们基于线粒体基因细胞色素 b 区，研究了日本列岛濒危淡水鲤科鱼类 Acheilognathus tabira tabira 的遗传种群结构。我们确认了之前研究中确定的三个品系的存在，并认为品系 I 和 II+III 的自然分布区分别是濑户内海和伊势湾地区。此外，利用分子方差空间分析法（SAMOVA）将濑户内海地区的种群划分为栖息在邻近水系的五个群。我们推测，濑户内海地区的种群在末次冰川时期通过单一的古水系迁移，然后由于海洋变迁而分离并产生遗传分化。吉野川水系种群与琵琶湖-淀川水系属于同一族群，而琵琶湖-淀川水系是横跨濑户内海的唯一独立水系，因此吉野川水系种群被估计为非本地种群。本研究提供了濑户内海地区 A. t. tabira 种群遗传分化的新证据，与之前的研究相比，本研究显著增加了个体数量和地点数量，从而对应于五个不同的群体。因此，我们建议将这五个群体作为濑户内海地区的保护单位。
{"title":"Phylogeography and genetic population structure of the endangered bitterling Acheilognathus tabira tabira Jordan & Thompson, 1914 (Cyprinidae) in western Honshu, Japan, inferred from mitochondrial DNA sequences","authors":"Gen Ito, Naoto Koyama, Ryota Noguchi, Ryoichi Tabata, Seigo Kawase, J. Kitamura, Yasunori Koya","doi":"10.3897/natureconservation.56.111745","DOIUrl":"https://doi.org/10.3897/natureconservation.56.111745","url":null,"abstract":"We examined the genetic population structure of the endangered freshwater cyprinid Acheilognathus tabira tabira in the Japanese archipelago, which has only been analyzed in limited sampling in previous studies, based on cytochrome b region of the mitochondrial gene. We confirmed the existence of the same three lineages determined in the previous study, the natural distribution area of Lineage I and II+III were considered to be the Seto Inland Sea and Ise Bay regions, respectively. Furthermore, the Seto Inland Sea region population was divided into five groups inhabiting neighboring water systems using the spatial analysis of molecular variance (SAMOVA). We estimated that populations in the Seto Inland Sea region migrated through a single paleowater system during the last glacial period and were then separated and genetically differentiated due to marine transgression. The Yoshino River system population was estimated to be a non-native population because it belonged to the same group as the Lake Biwa-Yodo River system, which is the only separate water system across the Seto Inland Sea. This study provides new evidence of genetic differentiation in A. t. tabira populations within the Seto Inland Sea region, where genetic differentiation has not been detected in previous studies, corresponding to five different groups by significantly increasing the number of individuals and sites compared with previous studies. Therefore, we propose these five groups as conservation units in the Seto Inland Sea region.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.3897/natureconservation.56.125561
J. Lemos‐Espinal, Geoffrey R. Smith
The Transvolcanic Belt (TVB) of Mexico is a biogeographic province of significant biodiversity, acting as a transition zone between eastern and western Mexico. Using available literature, we collected species lists for amphibians and reptiles in Mexican states within the TVB biogeographic province, updating them with additional literature. The TVB is home to 427 native species of amphibians and reptiles, 154 amphibians and 273 reptiles, which represent 30.5% of the species of amphibians and reptiles in Mexico. The TVB also houses 50 endemic species, with 84 species listed by the IUCN. Threats include habitat destruction and pollution. The TVB shares a significant portion of its amphibian and reptile species with neighboring provinces, particularly the Sierra Madre Oriental and the Sierra Madre del Sur, suggesting a mixture of species from both eastern and western Mexico. Cluster analyses based on species composition reveal distinct groupings of provinces, with the TVB forming a cluster with the Sierra Madre Oriental, Veracruzan, and Sierra Madre del Sur for both amphibians and reptiles. Conservation assessments indicate that a significant proportion of the amphibian and reptile species in the TVB are at risk, primarily due to habitat loss from urbanization, agriculture, and pollution. Urgent conservation actions are needed to protect the unique herpetofauna of the TVB from further decline.
{"title":"Amphibians and reptiles of the Transvolcanic Belt biogeographic province of Mexico: diversity, similarities, and conservation","authors":"J. Lemos‐Espinal, Geoffrey R. Smith","doi":"10.3897/natureconservation.56.125561","DOIUrl":"https://doi.org/10.3897/natureconservation.56.125561","url":null,"abstract":"The Transvolcanic Belt (TVB) of Mexico is a biogeographic province of significant biodiversity, acting as a transition zone between eastern and western Mexico. Using available literature, we collected species lists for amphibians and reptiles in Mexican states within the TVB biogeographic province, updating them with additional literature. The TVB is home to 427 native species of amphibians and reptiles, 154 amphibians and 273 reptiles, which represent 30.5% of the species of amphibians and reptiles in Mexico. The TVB also houses 50 endemic species, with 84 species listed by the IUCN. Threats include habitat destruction and pollution. The TVB shares a significant portion of its amphibian and reptile species with neighboring provinces, particularly the Sierra Madre Oriental and the Sierra Madre del Sur, suggesting a mixture of species from both eastern and western Mexico. Cluster analyses based on species composition reveal distinct groupings of provinces, with the TVB forming a cluster with the Sierra Madre Oriental, Veracruzan, and Sierra Madre del Sur for both amphibians and reptiles. Conservation assessments indicate that a significant proportion of the amphibian and reptile species in the TVB are at risk, primarily due to habitat loss from urbanization, agriculture, and pollution. Urgent conservation actions are needed to protect the unique herpetofauna of the TVB from further decline.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.3897/natureconservation.56.124555
Angie Elwin, Eyob Asfaw, Neil D’Cruze
The African lion Panthera leo is subject to numerous anthropogenic pressures across its natural range. In South Africa, although free ranging populations are increasing, the number of lions in captivity in private commercial facilities far outnumber those in the wild. South Africa’s captive lion industry was reportedly created primarily to generate income and take pressure off wild populations through the supply of captive-bred lions for trophy hunting. However, the industry has become a highly contentious topic under ongoing international scrutiny and debate. Here, we present new information from direct interviews with workers at two closed-access lion facilities located in North West Province, on how some facilities continue to use legal activities, such as captive breeding and hunting, to facilitate their involvement in the illegal international felid bone trade. The sources also report other illegal and unethical activities including animal welfare violations, unsafe conditions for workers, potential shifts to the commercial exploitation of other felid species such as tigers Panthera tigris and incidents involving poaching of captive lions and tigers by non-affiliated actors. Sources described how some facilities use various tools and tactics, such as security cameras, patrols and messaging apps to avoid detection during inspections. If the South African Government is to be successful in meeting its publicly stated goal of ending the captive lion industry, a comprehensive well-managed plan to transition away from current practices is required. To aid enforcement, the industry should also be fully audited, with all facilities officially registered, a moratorium on the breeding of lions and plans put in place to prevent the stockpiling of lion bones.
{"title":"Under the lion’s paw: lion farming in South Africa and the illegal international bone trade","authors":"Angie Elwin, Eyob Asfaw, Neil D’Cruze","doi":"10.3897/natureconservation.56.124555","DOIUrl":"https://doi.org/10.3897/natureconservation.56.124555","url":null,"abstract":"The African lion Panthera leo is subject to numerous anthropogenic pressures across its natural range. In South Africa, although free ranging populations are increasing, the number of lions in captivity in private commercial facilities far outnumber those in the wild. South Africa’s captive lion industry was reportedly created primarily to generate income and take pressure off wild populations through the supply of captive-bred lions for trophy hunting. However, the industry has become a highly contentious topic under ongoing international scrutiny and debate. Here, we present new information from direct interviews with workers at two closed-access lion facilities located in North West Province, on how some facilities continue to use legal activities, such as captive breeding and hunting, to facilitate their involvement in the illegal international felid bone trade. The sources also report other illegal and unethical activities including animal welfare violations, unsafe conditions for workers, potential shifts to the commercial exploitation of other felid species such as tigers Panthera tigris and incidents involving poaching of captive lions and tigers by non-affiliated actors. Sources described how some facilities use various tools and tactics, such as security cameras, patrols and messaging apps to avoid detection during inspections. If the South African Government is to be successful in meeting its publicly stated goal of ending the captive lion industry, a comprehensive well-managed plan to transition away from current practices is required. To aid enforcement, the industry should also be fully audited, with all facilities officially registered, a moratorium on the breeding of lions and plans put in place to prevent the stockpiling of lion bones.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141929279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-12DOI: 10.3897/natureconservation.55.121941
Pengcheng Ye, Xiao Zhao, Jianyong Wu
Biodiversity, ecosystems and the services they provide are crucial to the sustainable development of cities, the health and well-being of residents and the maintenance of urban ecological security. The continued decline of global species biodiversity and ecosystem service function has seriously affected the sustainable development of regional social economy. The core of ecological civilization thought is sustainable development, and promoting sustainable development is also the path and means to achieve ecological civilization. As the significant birthplace of ecological civilization thought of “Lucid waters and lush mountains are invaluable assets”, Huzhou has always been committed to creating an “important window” for building an ecological civilization and actively integrating biodiversity conservation into ecological conservation. Through unremitting efforts in recent decades, Huzhou has successfully achieved green sustainable development and reversed the trend of biodiversity loss. Thus, there is a need for a systematic review of successful initiatives in this region and identify the experiences and methods that can advance the sustainable development also in other parts of the world.
{"title":"Building a global-oriented ecological civilization: Huzhou’s actions and practice, China","authors":"Pengcheng Ye, Xiao Zhao, Jianyong Wu","doi":"10.3897/natureconservation.55.121941","DOIUrl":"https://doi.org/10.3897/natureconservation.55.121941","url":null,"abstract":"Biodiversity, ecosystems and the services they provide are crucial to the sustainable development of cities, the health and well-being of residents and the maintenance of urban ecological security. The continued decline of global species biodiversity and ecosystem service function has seriously affected the sustainable development of regional social economy. The core of ecological civilization thought is sustainable development, and promoting sustainable development is also the path and means to achieve ecological civilization. As the significant birthplace of ecological civilization thought of “Lucid waters and lush mountains are invaluable assets”, Huzhou has always been committed to creating an “important window” for building an ecological civilization and actively integrating biodiversity conservation into ecological conservation. Through unremitting efforts in recent decades, Huzhou has successfully achieved green sustainable development and reversed the trend of biodiversity loss. Thus, there is a need for a systematic review of successful initiatives in this region and identify the experiences and methods that can advance the sustainable development also in other parts of the world.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141652092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-08DOI: 10.3897/natureconservation.55.124893
A. Petruș-Vancea, Daniela Nicoleta Pop, F. Sucea, A. Dumbrava, Simona Ioana Vicaș, O. Stănășel, Traian Octavian Costea, Diana Cupșa
This study aimed to analyze the effect of pollution caused by stone quarries on the morpho-anatomy, biochemistry, and physiology of a medicinal wild bramble Rubus plicatus Weihe & Nees. Samples were collected from two natural protected areas: Iron Gates Natural Park and Jiu Gorge National Park, both located in the southwestern part of Romania, and two unpolluted areas from these parks as background sites. We carried out the following analyses on the collected leaves of this taxon: morphology, micromorphology, anatomy, assimilating pigments, heavy metals (Pb, Ni, Cr, Fe), dry mass, bioactive compounds (total phenols and flavonoids), and antioxidant capacity. The results showed more stomata, higher amounts of assimilating pigments, higher amounts of heavy metals (especially lead), less dry mass, less phenols, and more flavonoids in Rubus plicatus leaves from polluted areas compared to areas without sources of pollution. The increased number of stomata and the amounts of assimilator pigments revealed the mechanisms developed by this species in order to survive in polluted conditions.
{"title":"Rubus plicatus Weihe & Nees: resilience to pollution caused by stone quarries","authors":"A. Petruș-Vancea, Daniela Nicoleta Pop, F. Sucea, A. Dumbrava, Simona Ioana Vicaș, O. Stănășel, Traian Octavian Costea, Diana Cupșa","doi":"10.3897/natureconservation.55.124893","DOIUrl":"https://doi.org/10.3897/natureconservation.55.124893","url":null,"abstract":"This study aimed to analyze the effect of pollution caused by stone quarries on the morpho-anatomy, biochemistry, and physiology of a medicinal wild bramble Rubus plicatus Weihe & Nees. Samples were collected from two natural protected areas: Iron Gates Natural Park and Jiu Gorge National Park, both located in the southwestern part of Romania, and two unpolluted areas from these parks as background sites. We carried out the following analyses on the collected leaves of this taxon: morphology, micromorphology, anatomy, assimilating pigments, heavy metals (Pb, Ni, Cr, Fe), dry mass, bioactive compounds (total phenols and flavonoids), and antioxidant capacity. The results showed more stomata, higher amounts of assimilating pigments, higher amounts of heavy metals (especially lead), less dry mass, less phenols, and more flavonoids in Rubus plicatus leaves from polluted areas compared to areas without sources of pollution. The increased number of stomata and the amounts of assimilator pigments revealed the mechanisms developed by this species in order to survive in polluted conditions.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.3897/natureconservation.55.119797
Tomáš Janík, Dušan Romportl, Z. Křenová
In the face of ongoing anthropogenic pressure and biodiversity loss, there is a need to protect nature more effectively. Therefore, we propose a comprehensive and consecutive approach utilising landscape ecological principles and methods for effective landscape protection and spatial nature conservation. Methods applicable in various conditions are exemplified through case studies from the Šumava National Park, the largest NP in Czechia. Using a set of spatial environmental, landscape ecological and geographical data we can: Characterise the area of interest from the physical-geographical, socioeconomic, and management point of view to create the concept´s framework and review important background information for analysis of the area. Therefore, the key factors for landscape protection and biodiversity conservation are defined. Analyse trends and processes of landscape dynamics in terms of land cover, landscape structure and habitat fragmentation and connectivity, which helps us to set main objectives of landscape protection and nature conservation. Use data about environment conditions and key species and habitat occurrence to model habitat suitability, identify their suitable areas, and thus improve their protection. As a result, areas of high conservation value are distinguished. Synthetize outputs of the above-mentioned steps and prioritise the target goals of landscape protection and biodiversity conservation in the area of interest. This leads to the effective zonation, which is a necessary condition for the application of appropriate management measures.
{"title":"Applying landscape ecological principles in comprehensive landscape protection: Šumava National Park as a case study","authors":"Tomáš Janík, Dušan Romportl, Z. Křenová","doi":"10.3897/natureconservation.55.119797","DOIUrl":"https://doi.org/10.3897/natureconservation.55.119797","url":null,"abstract":"In the face of ongoing anthropogenic pressure and biodiversity loss, there is a need to protect nature more effectively. Therefore, we propose a comprehensive and consecutive approach utilising landscape ecological principles and methods for effective landscape protection and spatial nature conservation. Methods applicable in various conditions are exemplified through case studies from the Šumava National Park, the largest NP in Czechia. Using a set of spatial environmental, landscape ecological and geographical data we can:\u0000 Characterise the area of interest from the physical-geographical, socioeconomic, and management point of view to create the concept´s framework and review important background information for analysis of the area. Therefore, the key factors for landscape protection and biodiversity conservation are defined.\u0000 Analyse trends and processes of landscape dynamics in terms of land cover, landscape structure and habitat fragmentation and connectivity, which helps us to set main objectives of landscape protection and nature conservation.\u0000 Use data about environment conditions and key species and habitat occurrence to model habitat suitability, identify their suitable areas, and thus improve their protection. As a result, areas of high conservation value are distinguished.\u0000 Synthetize outputs of the above-mentioned steps and prioritise the target goals of landscape protection and biodiversity conservation in the area of interest. This leads to the effective zonation, which is a necessary condition for the application of appropriate management measures.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141699825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-04DOI: 10.3897/natureconservation.55.121181
Nina Dzhembekova, I. Zlateva, F. Rubino, Manuel Belmonte, Valentina Doncheva, Ivan Popov, S. Moncheva
The current study employed diverse statistical and machine learning techniques to investigate the biodiversity and spatial distribution of phytoplankton cysts in the Black Sea. The MaxEnt distribution modeling technique was used to forecast the habitat suitability for the cysts of three potentially toxic microalgal taxa (Lingulodinium polyedra, Polykrikos hartmannii, and Alexandrium spp.). The key variables controlling the habitat suitability of Alexandrium spp. and L. polyedra were nitrates and temperature, while for the P. hartmannii cysts, nitrates and salinity. The region with the highest likelihood of L. polyedra cyst occurrence appears to be in the western coastal and shelf waters, which coincides with the areas where L. polyedra red tides have been documented. The projected habitat suitability of the examined species partially overlapped, perhaps as a result of their cohabitation within the phytoplankton community and shared preferences for specific environmental conditions, demonstrating similar survival strategies. The north-western region of the Black Sea was found to be the most suitable environment for the studied potentially toxic species, presumably posing a greater risk for the onset of blooming events. Two distinct aspects of cysts’ ecology and settlement were observed: the dispersal of cysts concerns their movement within the water column from one place to another prior to settling, while habitat suitability pertains to the particular environment required for their survival, growth, and germination. Therefore, it is crucial to validate the model in order to accurately determine a suitable habitat as well as understand the transportation patterns linked to the particular hydrodynamic properties of the water column and the distinct features of the local environment.
{"title":"Spatial distribution models and biodiversity of phytoplankton cysts in the Black Sea","authors":"Nina Dzhembekova, I. Zlateva, F. Rubino, Manuel Belmonte, Valentina Doncheva, Ivan Popov, S. Moncheva","doi":"10.3897/natureconservation.55.121181","DOIUrl":"https://doi.org/10.3897/natureconservation.55.121181","url":null,"abstract":"The current study employed diverse statistical and machine learning techniques to investigate the biodiversity and spatial distribution of phytoplankton cysts in the Black Sea. The MaxEnt distribution modeling technique was used to forecast the habitat suitability for the cysts of three potentially toxic microalgal taxa (Lingulodinium polyedra, Polykrikos hartmannii, and Alexandrium spp.). The key variables controlling the habitat suitability of Alexandrium spp. and L. polyedra were nitrates and temperature, while for the P. hartmannii cysts, nitrates and salinity. The region with the highest likelihood of L. polyedra cyst occurrence appears to be in the western coastal and shelf waters, which coincides with the areas where L. polyedra red tides have been documented. The projected habitat suitability of the examined species partially overlapped, perhaps as a result of their cohabitation within the phytoplankton community and shared preferences for specific environmental conditions, demonstrating similar survival strategies. The north-western region of the Black Sea was found to be the most suitable environment for the studied potentially toxic species, presumably posing a greater risk for the onset of blooming events. Two distinct aspects of cysts’ ecology and settlement were observed: the dispersal of cysts concerns their movement within the water column from one place to another prior to settling, while habitat suitability pertains to the particular environment required for their survival, growth, and germination. Therefore, it is crucial to validate the model in order to accurately determine a suitable habitat as well as understand the transportation patterns linked to the particular hydrodynamic properties of the water column and the distinct features of the local environment.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-22DOI: 10.3897/natureconservation.55.114211
Millawati Gani, F. Sitam, Zubaidah Kamarudin, Siti Suzana Selamat, Nik Mohd Zamani Awang, H. N. Muhd-Sahimi, Michael Wong, Baharim Selat, Nur Fatin Khairunnisa Abdullah-Halim, Lim Shu Yong, Ling Fong Yoke, S. Yaakop, A. R. Mohd-Ridwan, B. M. Md-Zain
Understanding the prey preference of Malayan tiger (Panthera tigris jacksoni) in Malaysia is important to guide conservation planning initiatives. The utilisation of DNA metabarcoding provides valuable insights, particularly in the field of carnivora diet research. This technique has been proven to be effective for identifying various species within complex mixtures such as scat materials, where visual identification is challenging. The Cytochrome c oxidase subunit I (COI) locus has been selected as it is a widely used as an effective non-invasive approach for diet studies. Hence, given this advance approach, Malayan tiger scats were collected on the basis of existing records of their presence in two types of habitats, namely, protected areas (PA) and human–tiger conflict (HTC) areas. This study aimed to identify prey species in Peninsular Malaysia, based on Malayan tiger scat samples using DNA metabarcoding. Based on the partial mitochondrial COI region, DNA metabarcoding led to the taxonomic resolution of prey DNA remnants in scats and the identification of prey species consumed by Malayan tiger, which were predominately small-to-medium-sized prey, including livestock. The dominant DNA prey detected belongs to the family Canidae, followed by Bovidae, Vespertilionidae, Homonidae, Felidae, Phasianidae and Muridae. A significant difference (p < 0.05) was observed in alpha and beta diversity using the Shannon index and PERMANOVA with regard to prey richness and evenness in two different habitat groups, namely, PA and HTC. Our finding provides insights into Malayan tiger dietary requirements, which can be used to develop conservation plans and strategies for Malayan tiger, particularly for habitat priorities.
了解马来西亚马来亚虎（Panthera tigris jacksoni）对猎物的偏好对于指导保护规划活动非常重要。DNA 代谢编码的使用提供了宝贵的见解，尤其是在食肉动物饮食研究领域。这项技术已被证明可以有效地识别复杂混合物（如粪便材料）中的各种物种，而肉眼识别在这些混合物中是具有挑战性的。之所以选择细胞色素 c 氧化酶亚基 I（COI）位点，是因为它作为一种有效的非侵入性方法被广泛用于食性研究。因此，鉴于这种先进的方法，马来亚虎的粪便是根据现有的马来亚虎在两类栖息地，即保护区（PA）和人虎冲突区（HTC）的存在记录收集的。这项研究的目的是根据马来亚虎的粪便样本，利用DNA代谢编码来识别马来西亚半岛的猎物物种。基于部分线粒体COI区域，DNA代谢标定法对粪便中残留的猎物DNA进行了分类解析，并确定了马来亚虎食用的猎物种类，其中主要是中小型猎物，包括家畜。检测到的主要猎物DNA属于犬科，其次是牛科、鼬科、猿科、猫科、雉科和鼠科。使用香农指数和 PERMANOVA 对两个不同栖息地组（即 PA 和 HTC）的猎物丰富度和均匀度进行分析，观察到阿尔法和贝塔多样性存在明显差异（p < 0.05）。我们的研究结果提供了马来亚虎对食物需求的洞察力，可用于制定马来亚虎的保护计划和策略，特别是栖息地的优先次序。
{"title":"Unveiling prey preferences of endangered wild Malayan tiger, Panthera tigris jacksoni, in Peninsular Malaysia through scat analysis via COI DNA metabarcoding","authors":"Millawati Gani, F. Sitam, Zubaidah Kamarudin, Siti Suzana Selamat, Nik Mohd Zamani Awang, H. N. Muhd-Sahimi, Michael Wong, Baharim Selat, Nur Fatin Khairunnisa Abdullah-Halim, Lim Shu Yong, Ling Fong Yoke, S. Yaakop, A. R. Mohd-Ridwan, B. M. Md-Zain","doi":"10.3897/natureconservation.55.114211","DOIUrl":"https://doi.org/10.3897/natureconservation.55.114211","url":null,"abstract":"Understanding the prey preference of Malayan tiger (Panthera tigris jacksoni) in Malaysia is important to guide conservation planning initiatives. The utilisation of DNA metabarcoding provides valuable insights, particularly in the field of carnivora diet research. This technique has been proven to be effective for identifying various species within complex mixtures such as scat materials, where visual identification is challenging. The Cytochrome c oxidase subunit I (COI) locus has been selected as it is a widely used as an effective non-invasive approach for diet studies. Hence, given this advance approach, Malayan tiger scats were collected on the basis of existing records of their presence in two types of habitats, namely, protected areas (PA) and human–tiger conflict (HTC) areas. This study aimed to identify prey species in Peninsular Malaysia, based on Malayan tiger scat samples using DNA metabarcoding. Based on the partial mitochondrial COI region, DNA metabarcoding led to the taxonomic resolution of prey DNA remnants in scats and the identification of prey species consumed by Malayan tiger, which were predominately small-to-medium-sized prey, including livestock. The dominant DNA prey detected belongs to the family Canidae, followed by Bovidae, Vespertilionidae, Homonidae, Felidae, Phasianidae and Muridae. A significant difference (p < 0.05) was observed in alpha and beta diversity using the Shannon index and PERMANOVA with regard to prey richness and evenness in two different habitat groups, namely, PA and HTC. Our finding provides insights into Malayan tiger dietary requirements, which can be used to develop conservation plans and strategies for Malayan tiger, particularly for habitat priorities.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141113125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-21DOI: 10.3897/natureconservation.55.121842
M. Filipova-Marinova, D. Pavlov, K. Slavova
Multi-proxy analysis (spore-pollen, dinoflagellate cysts, other non-pollen palynomorphs (NPPs), radiocarbon dating and lithology) was performed on marine sediments from three new cores retrieved during the two cruise expeditions on board the Research Vessel “Akademik” in 2009 and 2011. The Varna transect comprises three cores extending from the outer shelf, continental slope and deep-water zone. The record spans the last 26000 years (all ages obtained in this study are given in calendar years BP (cal. yrs BP)). The pollen record reveals the spreading of steppe vegetation dominated by Artemisia and Chenopodiaceae, suggesting cold and dry environments during the Late Pleniglacial – Oldest Dryas (25903–15612 cal. yrs BP). Stands of Pinus and Quercus reflect warming/humidity increase during the melting pulses (19.2–14.5 cal. ka BP) and the Late Glacial interstadials Bølling and Allerød. The Younger Dryas (13257–11788 cal. yrs BP) coldest and driest environments are clearly demonstrated by the maximum relative abundance of Artemisia and Chenopodiaceae. During the Early Holocene (Preboreal and Boreal chronozones, 11788–8004 cal. yrs BP), Quercus appeared as a pioneer species and, along with other temperate deciduous arboreal taxa, formed open deciduous forests as a response to the increased temperature. The rapid expansion of these taxa indicates that they survived in Glacial refugia in the coastal mountains. During the Atlantic chronozone (8004–5483 cal. yrs BP), optimal climate conditions (high humidity and increased mean annual temperatures) stimulated the establishment of species-rich mixed temperate deciduous forests. During the Subboreal chronozone (5483–2837 cal. yrs BP), Carpinus betulus and Fagus expanded simultaneously and became more important components of mixed oak forests and probably also formed separate communities. During the Subatlantic chronozone (2837 cal. yrs BP to pre-industrial time), climate-driven changes (an increase of humidity and a cooling of the climate) appear to be the main drivers of the specific vegetation succession expressed by increased abundance of Alnus, Fraxinus excelsior and Salix along with lianas, suggesting formation of flooded riparian forests (so called ‘Longoz’) lining the river valleys along the Black Sea coast. The first indicators of farming and other human activities have been recorded since 7074 cal. yrs BP. The dinoflagellate cyst (dinocyst) assemblages have been analysed to assess the changes in the Black Sea environment over the last 26000 years in terms of fluctuation in paleoproduction and surface water conditions related to changes in climate, freshwater input and Mediterranean water intrusion. Two major dinocyst assemblages were distinguished: one dominated by stenohaline freshwater/brackish-water species and a successive one dominated by euryhaline marine species. The changes in the composition of the assemblages occurred at 7668 cal. yrs BP. The abrupt decrease of stenohaline freshwater/brack
我们的化石花粉和恐龙囊数据证实，与 "8.2 ka 寒冷事件 "相关的高振幅温度异常也可能发生在欧洲东南部，即黑海西部沿海地区的低纬度地区，这很可能是由于大气转换和/或河流排放造成的。
{"title":"Paleoclimate changes and ecosystem responses of the Bulgarian Black Sea zone during the last 26000 years","authors":"M. Filipova-Marinova, D. Pavlov, K. Slavova","doi":"10.3897/natureconservation.55.121842","DOIUrl":"https://doi.org/10.3897/natureconservation.55.121842","url":null,"abstract":"Multi-proxy analysis (spore-pollen, dinoflagellate cysts, other non-pollen palynomorphs (NPPs), radiocarbon dating and lithology) was performed on marine sediments from three new cores retrieved during the two cruise expeditions on board the Research Vessel “Akademik” in 2009 and 2011. The Varna transect comprises three cores extending from the outer shelf, continental slope and deep-water zone. The record spans the last 26000 years (all ages obtained in this study are given in calendar years BP (cal. yrs BP)). The pollen record reveals the spreading of steppe vegetation dominated by Artemisia and Chenopodiaceae, suggesting cold and dry environments during the Late Pleniglacial – Oldest Dryas (25903–15612 cal. yrs BP). Stands of Pinus and Quercus reflect warming/humidity increase during the melting pulses (19.2–14.5 cal. ka BP) and the Late Glacial interstadials Bølling and Allerød. The Younger Dryas (13257–11788 cal. yrs BP) coldest and driest environments are clearly demonstrated by the maximum relative abundance of Artemisia and Chenopodiaceae. During the Early Holocene (Preboreal and Boreal chronozones, 11788–8004 cal. yrs BP), Quercus appeared as a pioneer species and, along with other temperate deciduous arboreal taxa, formed open deciduous forests as a response to the increased temperature. The rapid expansion of these taxa indicates that they survived in Glacial refugia in the coastal mountains. During the Atlantic chronozone (8004–5483 cal. yrs BP), optimal climate conditions (high humidity and increased mean annual temperatures) stimulated the establishment of species-rich mixed temperate deciduous forests. During the Subboreal chronozone (5483–2837 cal. yrs BP), Carpinus betulus and Fagus expanded simultaneously and became more important components of mixed oak forests and probably also formed separate communities. During the Subatlantic chronozone (2837 cal. yrs BP to pre-industrial time), climate-driven changes (an increase of humidity and a cooling of the climate) appear to be the main drivers of the specific vegetation succession expressed by increased abundance of Alnus, Fraxinus excelsior and Salix along with lianas, suggesting formation of flooded riparian forests (so called ‘Longoz’) lining the river valleys along the Black Sea coast. The first indicators of farming and other human activities have been recorded since 7074 cal. yrs BP. The dinoflagellate cyst (dinocyst) assemblages have been analysed to assess the changes in the Black Sea environment over the last 26000 years in terms of fluctuation in paleoproduction and surface water conditions related to changes in climate, freshwater input and Mediterranean water intrusion. Two major dinocyst assemblages were distinguished: one dominated by stenohaline freshwater/brackish-water species and a successive one dominated by euryhaline marine species. The changes in the composition of the assemblages occurred at 7668 cal. yrs BP. The abrupt decrease of stenohaline freshwater/brack","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141116386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-16DOI: 10.3897/natureconservation.55.120594
Alejandra Galindo-Cruz, F. J. Sahagún-Sánchez, Fabiola López-Barrera, Octavio Rojas-Soto
Maintaining landscape connectivity is a conservation priority for biodiversity as it may mitigate the adverse effects of forest degradation, fragmentation, and climate change by facilitating species dispersal. Despite their importance for biodiversity conservation, Mexican tropical dry forests (TDFs) face high fragmentation rates due to anthropogenic activities. In this study, we analyzed the connectivity dynamics of TDFs in the Balsas Basin Biogeographic Province (BBBP) between 2013 and 2018, focusing on old-growth and secondary TDF covers, including Protected Areas and Important Bird Areas. We evaluated the effects of connectivity loss and gain on the distribution areas of 30 endemic bird species with ecological associations with TDFs in the BBBP. We found expansion in TDFs accounting for a total increase of 227,905 ha due to secondary forest increase (12%). In contrast, old-growth forests experienced a reduction of 66,576 ha in the study area (8%). We also found a decrease in areas with high and very-high connectivity, coupled with an increase in low connectivity, except for TDFs inside Protected Areas, which increased by 3,000 ha, leading to higher connectivity. There was an increase in total forest cover in 27 species’ potential distribution, highlighting the possible role of secondary forests in promoting connectivity between old-growth forest patches. Our results reveal the complex dynamics between forest types, connectivity, and bird-species distributions. Despite an overall increase in forested areas, most TDFs continue to have low connectivity, likely impacting biodiversity, particularly for species that rely on highly conserved ecosystems. This study underscores the importance of integrated conservation strategies considering connectivity, forest recovery, and the dynamics of species-ecosystem interactions.
{"title":"Recent changes in tropical-dry-forest connectivity within the Balsas Basin Biogeographic Province: potential effects on endemic-bird distributions","authors":"Alejandra Galindo-Cruz, F. J. Sahagún-Sánchez, Fabiola López-Barrera, Octavio Rojas-Soto","doi":"10.3897/natureconservation.55.120594","DOIUrl":"https://doi.org/10.3897/natureconservation.55.120594","url":null,"abstract":"Maintaining landscape connectivity is a conservation priority for biodiversity as it may mitigate the adverse effects of forest degradation, fragmentation, and climate change by facilitating species dispersal. Despite their importance for biodiversity conservation, Mexican tropical dry forests (TDFs) face high fragmentation rates due to anthropogenic activities. In this study, we analyzed the connectivity dynamics of TDFs in the Balsas Basin Biogeographic Province (BBBP) between 2013 and 2018, focusing on old-growth and secondary TDF covers, including Protected Areas and Important Bird Areas. We evaluated the effects of connectivity loss and gain on the distribution areas of 30 endemic bird species with ecological associations with TDFs in the BBBP. We found expansion in TDFs accounting for a total increase of 227,905 ha due to secondary forest increase (12%). In contrast, old-growth forests experienced a reduction of 66,576 ha in the study area (8%). We also found a decrease in areas with high and very-high connectivity, coupled with an increase in low connectivity, except for TDFs inside Protected Areas, which increased by 3,000 ha, leading to higher connectivity. There was an increase in total forest cover in 27 species’ potential distribution, highlighting the possible role of secondary forests in promoting connectivity between old-growth forest patches. Our results reveal the complex dynamics between forest types, connectivity, and bird-species distributions. Despite an overall increase in forested areas, most TDFs continue to have low connectivity, likely impacting biodiversity, particularly for species that rely on highly conserved ecosystems. This study underscores the importance of integrated conservation strategies considering connectivity, forest recovery, and the dynamics of species-ecosystem interactions.","PeriodicalId":501054,"journal":{"name":"Nature Conservation","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140966304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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