Identifying Key Processes and Drivers Affecting the Success of Non-indigenous Marine Species in Coastal Waters

Non-indigenous species (NIS) pose a major threat to biodiversity and the functioning and services of ecosystems. Despite their rapid spread in coastal waters worldwide, biotic invasions are widely disregarded in marine conservation planning. To guide conservation actions, a better understanding of the underlying mechanisms determining the success of NIS are therefore needed. Here we develop a joint modelling approach to identify the key drivers and community assembly processes determining the occurrence of invasive benthic invertebrates, using Danish coastal waters as a case study. To reflect factors affecting the introduction, establishment and spread of NIS throughout the area, we compiled long-term monitoring data on NIS, as well as information on commercial shipping, environmental conditions and estimates of larvae settling densities derived from drift model simulations informed by species traits. We then applied a set of species distribution models to identify the key drivers determining the occurrence of NIS. Our results demonstrate a significant positive effect of vessel activity, a negative effect of depth and bottom salinity, as well as a positive effect of the simulated settling densities on the probability of presence. Taken together, our results highlight the role of commercial shipping, habitat characteristics and passive advection of early-life stages on the success of NIS. Our joint modelling approach provide improved process understanding on the key community assembly processes determining the presence of NIS and may serve to guide monitoring, management and conservation planning in order to limit future invasions and their negative consequences on coastal ecosystems.

Multi-taxa spatial conservation planning reveals similar priorities between taxa and improved protected area representation with climate change

Protected area (PA) networks have in the past been constructed to include all major habitats, but have often been developed through consideration of only a few indicator taxa or across restricted areas, and rarely account for global climate change. Systematic conservation planning (SCP) aims to improve the efficiency of biodiversity conservation, particularly when addressing internationally agreed protection targets. We apply SCP in Great Britain (GB) using the widest taxonomic coverage to date (4,447 species), compare spatial prioritisation results across 18 taxa and use projected future (2080) distributions to assess the potential impact of climate change on PA network effectiveness. Priority conservation areas were similar among multiple taxa, despite considerable differences in spatial species richness patterns; thus systematic prioritisations based on indicator taxa for which data are widely available are still useful for conservation planning. We found that increasing the number of protected hectads by 2% (to reach the 2020 17% Aichi target) could have a disproportionate positive effect on species protected, with an increase of up to 17% for some taxa. The PA network in GB currently under-represents priority species but, if the potential future distributions under climate change are realised, the proportion of species distributions protected by the current PA network may increase, because many PAs are in northern and higher altitude areas. Optimal locations for new PAs are particularly concentrated in southern and upland areas of GB. This application of SCP shows how a small addition to an existing PA network could have disproportionate benefits for species conservation.

Identifying and prioritising climate change adaptation actions for greater one-horned rhinoceros (Rhinoceros unicornis) conservation in Nepal

Climate change has started impacting species, ecosystems, genetic diversity within species, and ecological interactions and is thus a serious threat to conserving biodiversity globally. In the absence of adequate adaptation measures, biodiversity may continue to decline, and many species will possibly become extinct. Given that global temperature continues to increase, climate change adaptation has emerged as an overarching framework for conservation planning. We identified both ongoing and probable climate change adaptation actions for greater one-horned rhinoceros conservation in Nepal through a combination of literature review, key informant surveys (n = 53), focus group discussions (n = 37) and expert consultation (n = 9), and prioritised the identified adaptation actions through stakeholder consultation (n = 17). The majority of key informants (>80%) reported that climate change has been impacting rhinoceros, and more than 65% of them believe that rhinoceros habitat suitability in Nepal has been shifting westwards. Despite these perceived risks, climate change impacts have not been incorporated well into formal conservation planning for rhinoceros. Out of 20 identified adaptation actions under nine adaptation strategies, identifying and protecting climate refugia, restoring the existing habitats through wetland and grassland management, creating artificial highlands in floodplains to provide rhinoceros with refuge during severe floods, and translocating them to other suitable habitats received higher priority. These adaptation actions may contribute to reducing the vulnerability of rhinoceros to the likely impacts of climate change. This study is the first of its kind in Nepal and is expected to provide a guideline to align ongoing conservation measures into climate change adaptation planning for rhinoceros. Further, we emphasise the need to integrating likely climate change impacts while planning for rhinoceros conservation and initiating experimental research and monitoring programs to better inform adaptation planning in the future.

North American tree migration paced by climate in the West, lagging in the East

Tree fecundity and recruitment have not yet been quantified at scales needed to anticipate biogeographic shifts in response to climate change. By separating their responses, this study shows coherence across species and communities, offering the strongest support to date that migration is in progress with regional limitations on rates. The southeastern continent emerges as a fecundity hotspot, but it is situated south of population centers where high seed production could contribute to poleward population spread. By contrast, seedling success is highest in the West and North, serving to partially offset limited seed production near poleward frontiers. The evidence of fecundity and recruitment control on tree migration can inform conservation planning for the expected long-term disequilibrium between climate and forest distribution.

The ambiguous impacts of alternative livelihoods on fisher wellbeing in a closed access fish sanctuary in Port Antonio, Jamaica

Alternative livelihood programs are a central feature of contemporary conservation planning that aim to aid efforts to reduce pressure on natural resources and avoid, minimize, or mitigate the impacts of conservation on the wellbeing of local stakeholders. Evidence of the effectiveness of these programs is, however, decidedly mixed. This research examines the relationship between livelihoods, conservation, and wellbeing among nearshore fishers in Port Antonio, Jamaica, in the context of a recently established marine no-take area. The East Portland Fish Sanctuary was established in 2016 with the aim of supporting the recovery of depleted nearshore fish stocks, marine habitats, and mitigating impacts on local communities and fishers through a range of activities. Mitigation of impacts included efforts to shift pressure from overexploited nearshore fish stocks to offshore resources and to provide support to fishers for training and opportunities to earn income in the tourism sector. The results suggest that additional sources of income tended to enhance the wellbeing of fishers across several dimensions but that it also contributed to additional pressure on nearshore resources. Furthermore, neither tourism nor offshore fishing appear to be particularly promising in terms of their ability to deliver “win-win” outcomes for conservation and wellbeing. Instead, the results suggest that the impacts of different types of alternative livelihoods on conservation and wellbeing are highly variable and perhaps that efforts should be redirected to supporting efforts to provide suitable and acceptable alternatives to spearfishing which appears to have one of the largest overall impacts on individual harvest rates.

Systematic Conservation Planning as a Tool for the Assessment of Protected Areas Network in Jordan

The present study aims to use systematic conservation planning to analyse and review the national protected areas (PAs) network in Jordan. The analysis included the application of three modules: the environmental risk surface (ERS), the relative biodiversity index (RBI), and the application of Marxan. The methodology was based on using Marxan to achieve solutions for three scenarios for the PAs network. Marxan was applied to the input data, which included vegetation types, distribution of threatened mammals and plants, locations of currently established PAs and other types of designations. The first two scenarios aimed to conserve 4% and 17%, respectively, of each vegetation type, and 10% and 20%, respectively, of the extent of occurrence of threatened mammals and plants. The third scenario aimed to conserve 17% of each vegetation type and 10% of the extent of occurrence of threatened plants and mammals, except for forest and the Hammada vegetation which had the target of 30% and 4%, respectively. The results of the three scenarios indicated that the boundaries of existing reserves should be extended to achieve the conservation targets. Some currently proposed (PAs), such as the Aqaba Mountains, did not appear in any of the solutions for the three scenarios indicating that the inclusion of these sites in the proposed (PAs) network should be reconsidered. All three scenarios highlighted the importance of having conservation areas between the western and eastern parts of the country. Systematic conservation planning is a structured, replicable, transparent, and defensible method for designing PA networks. It allows for finding efficient solutions building on what is currently conserved and minimizing the fragmentation and cost of the proposed solution for conservation areas.

Commoning Adaptive Heritage Reuse as a Driver of Social Innovation: Naples and the Scugnizzo Liberato Case Study

The adaptive reuse of cultural heritage assets is often problematic. What emerges is the urgency of a thoughtful negotiation between built forms and emerging needs and requests. In this view, a fruitful trajectory of development arises in commoning heritage by means of adaptive reuse. Hence, the purpose of this article is to investigate how community-led adaptive heritage re-use practices contribute to social innovation in terms of new successful model of urban governance, by providing a specific focus on innovative aspects that emerge in both heritage and planning sectors. Therefore, it also aims to improve the knowledge in the innovative power of heritage when conceptualized as performative practice. To this end, the paper presents the adaptation process of a former church complex located in Naples, today Scugnizzo Liberato, one of the bottom-up initiatives recognized by the Municipality of Naples as part of the urban commons network of the city. The research results are based on desk research, a literature review, and interviews with experts and activists, conducted as part of the OpenHeritage project (Horizon 2020). Initial evidence shows that profound citizen involvement throughout the whole heritage-making process might generate innovative perspectives in urban governance as well as conservation planning practice.