Strategic Conservation Planning Research Articles

Elevation gradients and environmental variables shaping tree diversity and composition in Srivilliputhur Wildlife Sanctuary, Western Ghats

ABSTRACT Srivilliputhur Wildlife Sanctuary holds significant value being a part of Western Ghats, which remains unexplored in terms of vegetation. The current study is the first quantitative assessment of tree distribution along an elevation gradient combined with environmental variables. Sampling was conducted from December 2020 to April 2021 in six elevation zones (Z1 to Z6). A total of 135 plots of 20m × 20m size were established, and the stems were measured (>30 cm GBH). Across a 5.4 ha studied area, 2157 individuals representing 188 tree species and 48 families were documented. Tree density (348-473 ind. ha−1), basal area (21.71-36.59 m2 ha−1), and species richness (84-122) were highest at mid-elevations. One-way ANOVA result highlighted the significant influence of elevation on species richness (p < 0.05). Canonical Correspondence Analysis revealed a good correlation between environmental variables and elevation. Furthermore, beta diversity showed intermediate dissimilarity between zones, ranging from 0.30 to 0.61. Z1 and Z6 exhibited the most dissimilarity (60%). Our study revealed tree diversity was least at higher elevations, suggesting good evidence of elevation and environmental filtering in shaping the overall tree diversity. Besides, the scarcity of a few species showed a point of concern. Hence, the current study suggests the implementation of strategic conservation plans to conserve species diversity in this area.

Citizen science enhances understanding of sea turtle distribution in the Gulf of California.

Citizen science is a valuable tool for addressing spatial distribution gaps in endangered species, especially in data-limited regions. Given the logistical and financial challenges of studying migratory species, this cost-effective approach contributes to strategic conservation planning. The Bay of La Paz, located in Baja California Sur, México, is considered an ecologically important region within the larger Gulf of California. Due to its rich biodiversity and abundant natural resources, the region serves as a hub for ecotourism and fishing, affording diverse opportunities for community-based scientific initiatives. This paper examines the value of citizen science contributions from three diverse community groups (i.e., coastal residents, SCUBA divers, and artisanal fishers) to help scientists obtain information on sea turtle distribution in the Bay of La Paz. Our findings represent the first records of loggerhead turtles (Caretta caretta) in the bay based on ten citizen science reports that include live and dead turtles (either observed swimming, as bycatch, or stranded), providing new information on an endangered pelagic species identified in a coastal bay. Although the sample size is small, our diversity of sources and sighting types highlight the value of collaborative citizen science initiatives in complementing traditional research methods.

Competition vs cooperation: An agent based model for sustainable tomatoes’ import system

Food systems are dominated by multiple risks inflicted by their surrounding environments that pose pressures on the continuous and efficient supply of food products. Market dynamics represented by competitive and cooperative behaviors of the system's main players is one of the uncertainties that influence the availability and affordability of food products. Efficient modeling of these risks can assist decision-makers in simulating and predicting future actions that mitigate the impact that market dynamics have on the provision of food products. This paper suggests an Agent-based model-based framework that simulates the behavior and tracks the economic and environmental performances of the tomato supply system in the State of Qatar. It considers three different scenarios representing the current situation of the market in addition to a competitive and a cooperative trade network. Interactions between trade partners are modeled using two game theoretic approaches counting Cournot competition and Cartel collusion. Based on the research findings, a competitive global market can bring economic benefits to Qatar as an importing nation, but this approach also entails substantial water consumption and results in significant environmental emissions. Conversely, collaboration among exporting countries demonstrates a potential 20% reduction in water usage and a 15% decrease in environmental emissions compared to the competitive scenario, offering enhanced environmental performance albeit at higher economic costs. This study provides a prescriptive analysis that enables policymakers to quantify the trade-offs between economic efficiency and environmental sustainability. These insights are crucial for guiding strategic planning for food supply security and environmental conservation. By understanding the implications of market structure changes, policymakers can navigate potential challenges more effectively and develop targeted policy interventions that enhance the resilience of the food supply system against market volatility and environmental impacts. This analysis supports proactive policy-shaping that aligns with their desired outcomes, ensuring a balanced approach to managing economic benefits and environmental considerations.

Testing the applicability of environmental DNA metabarcoding to landscape genetics.

Landscape genetics is a field dealing with local genetic differences and contributes to strategic conservation planning. Recently, environmental DNA (eDNA) metabarcoding has proven useful not only for detecting species but also for assessing genetic diversity and genetic structure on a large scale such as in phylogeography. However, it remains unclear whether eDNA analysis also has sufficient power to perform the landscape genetics, which focuses on a local scale. To reveal the applicability of eDNA to landscape genetics, we conducted an eDNA metabarcoding analysis of the mitochondrial DNA D-loop region of the fluvial sculpin Cottus nozawae in the upper Sorachi River in Japan and compared the results with inferences based on traditional tissue-based approaches by the same D-loop region and genome-wide SNP data. As a result, the spatial distribution of haplotypes was generally consistent between the eDNA- and tissue-based approaches. In addition, the genetic differentiation statistics calculated using eDNA and tissue samples were highly correlated when comparing both in the D-loop region. The removal of low-frequency reads or the conversion to semi-quantitative rankings of eDNA data did not alter the correlation of genetic diversity and differentiation statistics with tissue-based approaches much. Finally, we confirmed that analyses using eDNA data can reveal patterns such as isolation-by-distance shown in previous studies on this species, indicating the applicability of eDNA to basic landscape genetics. Even though some limitations remain, eDNA may have great potential for conducting basic landscape genetics.

Using local ecological knowledge to determine the status of Cantor's giant softshell turtle Pelochelys cantorii in Kerala, India

AbstractThe Critically Endangered Cantor's giant softshell turtle Pelochelys cantorii is a freshwater turtle found in South and Southeast Asia. Its population is declining because of habitat destruction and alteration, and hunting for its meat. Data on the species’ ecology, behaviour, population size, distribution and threats are limited, and previous surveys undertaken in India have failed to detect individuals in the wild. This lack of data hinders strategic conservation planning. Ecologists and conservationists increasingly utilize local ecological knowledge to determine the status and gain insights into the ecology of threatened and rare species that are difficult to detect in field studies. To examine the historical and current occurrence of Cantor's giant softshell turtle, we conducted community interviews along the Chandragiri River in Kerala, India. With data from these interviews, we identified multiple sites where the species continues to occur. Older respondents and those that used the river for fishing and irrigation were more likely to report sightings of the species. Our findings also improved knowledge about the turtles’ seasonal and diel activity patterns. A network of key informants identified through the interviews provided information on turtle bycatch, sightings and nesting. This network is being utilized for the continued monitoring of the species and could help in devising evidence-based management strategies for softshell turtles in India. These methods can also be adopted more widely for other threatened species of freshwater turtles globally.

Amphibians and Reptiles of the Montagne des Français: An Update of the Distribution and Regional Endemicity.

The harmonious landscape of Montagne des Français is a protected area in the far north of Madagascar. Our herpetofauna surveys were conducted on the eastern and western slopes according to habitat variations within the massif for 2014 and 2020. Our research updates the herpetofauna species richness, spatial distribution ranges, and ecological guilds within the protected area. We used direct opportunistic observations, systematic refuge examinations, and pitfall traps with drift fences at three sites to sample animals. Nineteen amphibian and fifty reptile species were recorded during this study. Three amphibian species and one reptile species, in addition to the snake Langaha pseudoalluaudi, last recorded in 2007, were discovered at Montagne des Français. Here, we present a database update for the herpetofauna species from Montagne des Français and provide a specific morphological description of the morphospecies considered as a new extension or localized distribution. This new database can help site managers develop new strategic conservation plans in response to habitat modification.

What's hot and why?

What's hot and why?

Monitoring invasive pines using remote sensing: a case study from Sri Lanka

Production plantation forestry has many economic benefits but can also have negative environmental impacts such as the spreading of invasive pines to native forest habitats. Monitoring forest for the presence of invasive pines helps with the management of this issue. However, detection of vegetation change over a large time period is difficult due to changes in image quality and sensor types, and by the spectral similarity of evergreen species and frequent cloud cover in the study area. The costs of high-resolution images are also prohibitive for routine monitoring in resource-constrained countries. This research investigated the use of remote sensing to identify the spread of Pinus caribaea over a 21-year period (2000 to 2021) in Belihuloya, Sri Lanka, using Landsat images. It applied a range of techniques to produce cloud free images, extract vegetation features, and improve vegetation classification accuracy, followed by the use of Geographical Information System to spatially analyze the spread of invasive pines. The results showed most invading pines were found within 100 m of the pine plantations’ borders where broadleaved forests and grasslands are vulnerable to invasion. However, the extent of invasive pine had an overall decline of 4 ha over the 21 years. The study confirmed that remote sensing combined with spatial analysis are effective tools for monitoring invasive pines in countries with limited resources. This study also provides information to conservationists and forest managers to conduct strategic planning for sustainable forest management and conservation in Sri Lanka.

Remote sensing shows south-east Queensland koalas (Phascolarctos cinereus) prefer areas of higher tree canopy height within their home ranges

Context Home range studies allow investigation of faunal habitat use within a well-defined area, and for some species, the concept of ‘core’ and ‘non-core’ home ranges provides the means to examine how resource use varies within home ranges. Taking this approach, we investigated whether koalas preferentially used areas of taller forest canopy within home ranges. After an extensive examination of data quality and home range estimation methods, we used remote sensing techniques to provide canopy height information at high resolution. Aims In many areas, koalas prefer taller individual trees at the plot scale; our aim was to investigate whether koalas prefer forest areas with higher canopy height within their home ranges. Methods In our southeast Queensland study area, we developed a canopy height model (CHM) from airborne LiDAR (Light Detection and Ranging) data. Existing radio telemetry and GPS data from 135 koalas were used to generate home ranges using 95% kernel density estimators, and 50% kernels represented core home ranges. Some home ranges occupied more than one forest type (Regional Ecosystem – RE); we treated each RE as an individual patch, and used 225 patches in our analysis. We intersected the 95% kernels with the CHM, and used hierarchical spatial clustering to derive four categorical canopy height classes within each patch. We then compared differences in height class area proportions between core and non-core areas for each patch. Key results The highest of the four canopy height classes comprised a significantly higher proportion of core areas (42.3%) than non-core areas (30.7%). Classes 2 and 3 were evenly distributed, and the proportion of Class 4 (lowest canopy height) was 20.3% of non-core areas and 11.0% in core areas. Results were similar for REs grouped by Land Zone and individual REs. Conclusions and implications We conclude that areas of higher canopy are an important habitat resource for koalas. We have, for the first time, examined resource variability within entire koala home ranges using remote sensing, and our methods demonstrate an avenue for further research using other forms of remote sensing. Classified canopy height models could also be used for strategic conservation planning, and at population-level koala habitat management when combined with other relevant habitat factors.

Status of the largetooth sawfish in Ecuador and Peru, and use of rostral teeth in cockfighting

Sawfish conservation is a critical concern, yet insufficient baseline data on their presence and status has hindered conservation efforts at national and regional levels. Between 2015 and 2017, interviews were conducted in fishing communities in Ecuador and Peru to assess the historical and current status of largetooth sawfish Pristis pristis. Interviews with cockfighting practitioners in Peru aimed to gauge the use and demand for cockfighting spurs made from sawfish rostral teeth. Our study confirmed the presence of largetooth sawfish in the waters of both countries. Importantly, some fishermen are aware of the value of rostral teeth, which may influence their decisions not to release sawfish alive. Of the interviewees (n = 188), a majority (88%) reported a perceived decline in sawfish abundance during their lifetimes. In this region, as in other sawfish habitats, bycatch and habitat loss pose significant threats. To address these challenges, potential actions include strategic conservation planning, reinforced national and international trade regulations, education campaigns targeting the cockfighting community, public outreach initiatives, and the live release of sawfish specimens. These efforts can enhance the conservation status of largetooth sawfish, particularly in a region isolated from other persisting populations that potentially harbours vital genetic diversity. Furthermore, safeguarding sawfish contributes to the implementation of national instruments like the National Action Plans for Sharks in both countries. Neglecting these threats could perpetuate sawfish capture and mortality in a region where local populations are already severely depleted, elevating the risk of regional extinction. Prioritizing sawfish conservation is imperative to prevent further decline and preserve their ecological importance.

Community composition and phyto-diversity assessment of ganda roba and ganda shabbo sites in Damota natural vegetation, eastern Ethiopia

Anthropogenic activities like overexploitation of natural vegetation and plantation of exotic species in degraded areas are commonly occurring in the natural vegetation of Ethiopia. Natural forests conserve plant species and provide a number of ecosystem services to society. This study focuses on the tree species composition and regeneration possibility of Ganda Roba and Ganda Shabbo in Natural Vegetation of Damota, Eastern Ethiopia. The sample of tree species were collected from 40 plots of 20 m × 20 m, while seedlings and saplings were collected from 160 plots of 5 m × 5 m and 320 plots of 1 m × 1 m, respectively from elevations ranging from 2039-3023 m. There were 47 tree species identified, belonging to 32 genera and 21 families, with Fabacaea being the most prominent family with the most species. The mean species richness of adult trees was 39 ± 2.4, for saplings 38 ± 6.5, and for seedlings, it was 34.5 ± 5.3. The average seedling density was 21850 ± 1131.37 individuals ha−1, for saplings 17162.5 ± 972.27 individuals ha−1, and of mature trees 12450 ± 2050.61individuals ha−1. The mean basal area for trees, saplings, and seedlings were 267.65 ± 30.78 m2 ha−1, 68.6 ± 4.12 m2 ha−1, and 45.83 ± 2.86 m2 ha−1, respectively. Good regeneration was seen in 41% of total species in the Ganda Roba site while in Ganda Shabbo fair regeneration was seen in 44% of species. In Ganda Roba and Ganda Shabbo sites, 7% and 6% of species exhibited no regeneration respectively. Density-diameter distribution curve exhibited a consistent reduction in tree densities with an rise in DBH patterns. The current study provides baseline information for foresters and policymakers to better manage the forest for sustaining tree diversity and regeneration patterns and formulate better strategic conservation plans for the future.

Juvenile emperor penguin range calls for extended conservation measures in the Southern Ocean.

To protect the unique and rich biodiversity of the Southern Ocean, conservation measures such as marine protected areas (MPAs) have been implemented. Currently, the establishment of several additional protection zones is being considered based on the known habitat distributions of key species of the ecosystems including emperor penguins and other marine top predators. However, the distribution of such species at sea is often insufficiently sampled. Specifically, current distribution models focus on the habitat range of adult animals and neglect that immatures and juveniles can inhabit different areas. By tracking eight juvenile emperor penguins in the Weddell Sea over 1 year and performing a meta-analysis including previously known data from other colonies, we show that conservation efforts in the Southern Ocean are insufficient for protecting this highly mobile species, and particularly its juveniles. We find that juveniles spend approximately 90% of their time outside the boundaries of proposed and existing MPAs, and that their distribution extends beyond (greater than 1500 km) the species' extent of occurrence as defined by the International Union for Conservation of Nature. Our data exemplify that strategic conservation plans for the emperor penguin and other long-lived ecologically important species should consider the dynamic habitat range of all age classes.

Understanding spatial patterns of poaching pressure using ranger logbook data to optimize future patrolling strategies.

Poaching is driving many species toward extinction, and as a result, lowering poaching pressure is a conservation priority. This requires understanding where poaching pressure is high and which factors determine these spatial patterns. However, the cryptic and illegal nature of poaching makes this difficult. Ranger patrol data, typically recorded in protected area logbooks, contain information on patrolling efforts and poaching detection and should thus provide opportunities for a better understanding of poaching pressure. However, these data are seldom analyzed and rarely used to inform adaptive management strategies. We developed a novel approach to making use of analog logbook records to map poaching pressure and to test environmental criminology and predator-prey relationship hypotheses explaining poaching patterns. We showcase this approach for Golestan National Park in Iran, where poaching has substantially depleted ungulate populations. We digitized data from >4800 ranger patrols from 2014 to 2016 and used an occupancy modeling framework to relate poaching to (1) accessibility, (2) law enforcement, and (3) prey availability factors. Based on predicted poaching pressure and patrolling intensity, we provide suggestions for future patrol allocation strategies. Our results revealed a low probability (12%) of poacher detection during patrols. Poaching distribution was best explained by prey availability, indicating that poachers target areas with high concentrations of ungulates. Poaching pressure was estimated to be high (>0.49) in 39% of our study area. To alleviate poaching pressure, we recommend ramping up patrolling intensity in 12% of the national park, which could be achievable by reducing excess patrols in about 20% of the park. However, our results suggest that for 27% of the park, it is necessary to improve patrolling quality to increase detection probability of poaching, for example, by closing temporal patrolling gaps or expanding informant networks. Our approach illustrates that analog ranger logbooks are an untapped resource for evidence-based and adaptive planning of protected area management. Using this wealth of data can open up new avenues to better understand poaching and its determinants, to expand effectiveness assessments to the past, and, more generally, to allow for strategic conservation planning in protected areas.

Comparison of Marine Ecosystems of Haizhou Bay and Lvsi Fishing Ground in China Based on the Ecopath Model

Recently, under the impacts of environmental shifts and human activities, marine ecosystem conservation and recovery have become increasingly important for the management and sustainable development of fishery resources. We construct two Ecopath models to describe and compare the similarities and differences in the structure and function of the ecosystems in Haizhou Bay (HZB) for 2020–2021 and Lvsi Fishing Ground (LSFG) for 2018–2019 in this study. Our results highlight the similarities of the two ecosystems in which plankton (e.g., zooplankton and phytoplankton) are important functional groups with bottom-up effect control and congers control the top-down effect. The differences between the two ecosystems indicate that the HZB ecosystem is relatively mature due to higher Finn’s cycling index (FCI), Finn’s mean path length (FMPL), Connectance Index (CI), System Omnivory Index (SOI), and Ascendency/capacity (A/C). However the food web structure in the LSFG is more diverse and stable with higher Overhead/capacity (O/C) and Overhead/capacity (H). The differences are possibly due to the low trophic level (TL) species composition in the two ecosystems. Therefore, we suggest that stock enhancement and release methods should be deployed to release high TL species into designated water areas to increase food web complexity and ecosystem maturity in HZB and LSFG. This study will help inform ecosystem and fishery regulations in different ways and facilitate discussion towards the establishment of strategic conservation planning and adaptive management.

State of knowledge of the Chilean giant frog (Calyptocephalella gayi)

Globally, at least 43% of amphibian species are declining, due primarily to habitat destruction and modification, over-exploitation, emerging diseases, and invasive alien species. In Chile there are 60 species of amphibians and of these, 62% are endemic and 73% are in a conservation category, such as the Chilean giant frog (Calyptocephalella gayi), a living fossil classified as vulnerable by the International Union for Conservation of Nature (IUCN). Its decline is associated with over-exploitation for sale of its meat as a gourmet product, together with the “megadrought” experienced by Chile in recent years, and the presence of the pathogen Batrachochytrium dendrobatidis, which is causing amphibian mortalities all over the world. The sustained increase in threats to this frog species requires strategic conservation planning, which should be based on the knowledge of aspects of their basic biology. This led us to search for the available published information on this species, compiling the reachable data on the web from 1927 to 2019. We found 353 publications, and our two main conclusions about the knowledge on this species are that there is a high percentage (43%) of publications focused on studies of the morpho-physiological aspects, and that there is a significant lack of data on its ecology and natural history. We discuss how these deficiencies limit the possibility of implementing adequate management and/or conservation plans for this species, and finally propose areas of study that should provide a solid contribution towards the preservation of this species.

Assessment of threatened status, phytochemical composition and biological properties of three Aconitum species from Kashmir Himalaya - India

Genus Aconitum (Ranunculaceae) is represented by 6–8 species from Kashmir Himalaya. Traditionally Aconitum species are used to treat a wide array of diseases, but their ethnopharmacological validation and phytochemistry are hitherto unreported from Kashmir Himalaya. The present study was undertaken to bring insights into the traditional use and distribution pattern of three Aconitum species from the region. An ethnobotany-directed approach was employed to study the conservation status of three Aconitum species. Their phytochemical profiles and biological properties were screened under in vitro conditions. Folin–ciocalteu and Aluminium chloride assays were employed to measure their total phenolic and total flavonoid contents, respectively. Plant extracts were evaluated for antioxidant, antimicrobial and anti-inflammatory activities. Three Aconitum species, viz. Aconitum heterophyllum Wall. ex Royle, Aconitum violaceum Jacquem. ex Stapf and Aconitum chasmanthum Stapf. ex Holmes showed dwindling conservation status in Kashmir Himalaya. Aconitum extracts showed significant variations in total phenolic and flavonoid contents. Antioxidant activity of Aconitum chasmanthum methanolic extract was studied to be comparatively higher (80.115%). Aconitum chasmanthum DCM &amp; methanolic extracts showed a good MIC value of 0.125 mg/ml against Candida albicans and Streptococus pyogenes, respectively. The percent inhibition of NLRP inflammasome was found significant in Aconitum violaceum ethyl acetate extract (74.61%). The present study revealed that Aconitum species are constantly declining at least in investigated habitats of Kashmir Himalaya and hence need strategic conservation planning. The results also emphasized the utility of Aconitum species as an antioxidant, antimicrobial and anti-inflammatory agent that could be used to manage various health problems.

Using stakeholders' preference for ecosystems and ecosystem services as an economic basis underlying strategic conservation planning

Ecosystem services (ES), commonly defined as the benefits people get from ecosystems, are key components in improving human well-being. However, as land utilization transitions from forest and agricultural land to urban areas and industrial complexes, the continuous provision of ES is affected. To ensure sustainable development, conservation programs should be implemented that consider both the stakeholders' well-being while also maintaining ecosystem health and integrity. Consequently, to improve the strategic implementation of conservation programs, it is critical to understand stakeholders' preferences.Using an online survey, we elicited South Carolina residents' preference in prioritizing the target ecosystems and ecosystem services in the state. The results identified that the priority ecosystem service is water quality regulation. However, the residents' preference for water quality regulation does not discredit the importance of maintaining the continuous water supply provision. In terms of ecosystem preference, residents indicated that the forest ecosystem is the priority ecosystem to be conserved, particularly for younger residents, respondents with high income, and those in the midland and the upstate. This could be attributed to the forest's effect on the ecosystem services that these respondents receive, particularly towards water-related ecosystem services. Understanding the residents' preference provides information that could improve the state water plans and other potential policy implications to land use-land cover planning and landscape sustainability management.

Safeguarding freshwater life beyond 2020: Recommendations for the new global biodiversity framework from the European experience

AbstractPlans are currently being drafted for the next decade of action on biodiversity—both the post‐2020 Global Biodiversity Framework of the Convention on Biological Diversity (CBD) and Biodiversity Strategy of the European Union (EU). Freshwater biodiversity is disproportionately threatened and underprioritized relative to the marine and terrestrial biota, despite supporting a richness of species and ecosystems with their own intrinsic value and providing multiple essential ecosystem services. Future policies and strategies must have a greater focus on the unique ecology of freshwater life and its multiple threats, and now is a critical time to reflect on how this may be achieved. We identify priority topics including environmental flows, water quality, invasive species, integrated water resources management, strategic conservation planning, and emerging technologies for freshwater ecosystem monitoring. We synthesize these topics with decades of first‐hand experience and recent literature into 14 special recommendations for global freshwater biodiversity conservation based on the successes and setbacks of European policy, management, and research. Applying and following these recommendations will inform and enhance the ability of global and European post‐2020 biodiversity agreements to halt and reverse the rapid global decline of freshwater biodiversity.

Summer roosts of “The revenant” flat-headed myotis, Myotis planiceps

Abstract The flat-headed myotis (Myotis planiceps) was declared extinct in 1996 but rediscovered in 2004, thus the reference to a revenant, one who came back from the dead, as it was declared extinct in 1996 but rediscovered in 2004. However, the species still faces serious extinction risk. To aid in the strategic planning and priorities for conservation, we studied roosting ecology. These bats inhabit the Chihuahuan Desert in one of the smallest distributional ranges of any mammal. Using radiotelemetry, we located 25 summer roosts, all in the skirts of dry leaves of yucca trees (Yucca carnerosana). We conclude that to roost, these bats search for clumps of tall yucca trees with a mean height of 3.93 m and mean width of skirts of 1.35 m.

Ex situ management as insurance against extinction of mammalian megafauna in an uncertain world.

The persistence of endangered species may depend on the fate of a very small number of individual animals. In situ conservation alone may sometimes be insufficient. In these instances, the International Union for Conservation of Nature provides guidelines for ex situ conservation and the Convention on Biological Diversity (CBD) indicates how ex situ management can support the CBD's objectives by providing insurance policies for species. The circumstances that justify its use are uncertain. To evaluate the current in situ extinction risk and ex situ management of 43 critically endangered species of mammalian megafauna, we used nonmetric multidimensional scaling and geopolitical variables related to governance, economics, and national policy within their extant ranges. We then fitted generalized additive models to assess the contribution of each variable to the ordination. Fifteen (almost one-third) of the world's terrestrial mammalian megafauna are not the subject of any ex situ management. Seventy-three percent of these taxa occur in areas characterized by political uncertainty, such as border zones or areas affected by armed conflicts, mainly in Africa and the Middle East. A further 23% of taxa in ex situ programs do not meet sustainability criteria for inbreeding avoidance. Strategic conservation planning, such as the One Plan approach, may improve ex situ management for these taxa. Given the escalating trend in threats afflicting megafauna, ex situ management should be considered more rigorously, particularly in politically unstable regions, to achieve CBD Target 12 (prevent extinction of threatened species).