Nature recovery actions within anthropogenic landscapes typically target small and unrepresentative species subsets, or generic habitat features that are assumed to benefit wider suites of species, despite incomplete understanding of what these species are, or of their autecological needs. These limitations in the evidence underpinning conservation contribute to continuing biodiversity losses.Experimental evidence shows improved outcomes follow the use of spatially-targeted audits of multi-taxa biodiversity information, allowing actions to be tailored towards the ecological requirements of complete local species pools. We illustrate how this approach could be integrated into environmental policy, with particular reference to the European Union's 2030 Biodiversity Strategy and the UK Environment Act 2021's Local Nature Recovery Strategies (LNRS).Biodiversity auditing uses existing repositories of species occurrence and functional trait data to group priority species into cross-taxa 'management guilds' that share similar responses to conservation interventions, allowing practitioners to identify and implement regionally-optimized, evidence-based action plans. Where previously implemented, this approach has successfully transformed conservation practices at bioregional scales, increasing the richness and abundance of priority species relative to pre-existing management.We provide methods for incorporating rapid low-cost biodiversity auditing into local conservation strategies, to ensure these support the widest complement of priority biodiversity. Failure to adopt a data-driven approach risks reproducing previously ineffective paradigms, and thus failing to seize vital chances to reverse declines in biodiversity. We further argue that researchers should prioritize the development of accessible tools to support authorities to incorporate species data into strategic landscape-scale conservation design.
A fundamental issue in migration biology is how birds decide when to start their journey, given that arriving too early or too late in a variable environment reduces individual fitness. Internal circannual regulation and predictable cues such as photoperiod prepare birds for migration, while variable external cues such as temperature and wind are thought to fine-tune departure times; however, this has not been demonstrated at the key point at which an individual animal decides to start migrating. In theory, environmental cues correlated between departure and arrival sites allow informed departure decisions. For 48 satellite-tracked Asian houbara Chlamydotis macqueenii, a medium-distance migrant with climatic connectivity between wintering and breeding areas, each tracked across multiple years, spring departure was under individually consistent temperature conditions, with greater individual repeatability than for photoperiod or wind. Individuals occupied a range of wintering sites latitudinally spanning 1,200 km but departed at lower temperatures from more northerly latitudes. These individual departure decisions produced earlier mean population-level departure and arrival dates in warmer springs. Phenological adjustments were fully compensatory, because individuals arrived on the breeding grounds under similar temperature conditions each year. Individuals' autumn departure decisions were also repeatable for temperature but less distinct than for spring, likely because of relaxed time constraints on leaving breeding grounds and the use of wind as a supplementary departure cue. We show that individual-level departure decisions informed by local temperatures can preadapt a population to adjust its population-level phenology in response to annual variability in spring temperatures without requiring genetic change in reaction thresholds.
Maintaining appropriate migratory strategies is important in conservation; however, translocations of migratory animals may alter locally evolved migration behaviours of recipient populations if these are different and heritable. We used satellite telemetry and experimental translocation to quantify differences and assess heritability in migration behaviours between three migratory Asian houbara (Chlamydotis macqueenii) breeding populations (640 km range across eastern, central and western Uzbekistan). Adults from the eastern population migrated twice as far (mean = 1184 km ± 44 s.e.) as the western population (656 km ± 183 s.e.) and showed significantly less variation in migration distance than the central population (1030 km ± 127 s.e.). The western and central populations wintered significantly further north (mean: +8.32° N ± 1.70 s.e. and +4.19° N ± 1.16 s.e., respectively) and the central population further west (−3.47° E ± 1.46 s.e.) than individuals from the eastern population. These differences could arise from a differing innate drive, or through learnt facultative responses to topography, filtered by survival. Translocated birds from the eastern population (wild-laid and captive-reared, n = 5) migrated further than adults from either western or central recipient populations, particularly in their second migration year. Translocated birds continued migrating south past suitable wintering grounds used by the recipient populations despite having to negotiate mountain obstacles. Together, this suggests a considerable conserved heritable migratory component with local adaptation at a fine geographic scale. Surviving translocated individuals returned to their release site, suggesting that continued translocations would lead to introgression of the heritable component and risk altering recipient migration patterns. Conservation biologists considering translocation interventions for migratory populations should evaluate potential genetic components of migratory behaviour.
Shade-grown cocoa has been suggested as a more carbon and biodiversity friendly land use around protected forests compared with slash-and-burn farmland, and may be particularly suitable for achieving livelihood, biodiversity and forest protection goals of REDD + projects. However, loss of cocoa to wildlife perceived to come from forest protected areas can result in lower profits for local people, reduced livelihood benefits from development projects and negative perceptions of conservation leading to reduced conservation impacts. We collected and analysed data on cocoa pod numbers and damage by animals over 2 months of the cocoa growing season, coinciding with peak harvesting season, from 39 plots at 3 forest edge communities around Gola Rainforest National Park, Sierra Leone. We estimate that 20% of pods across the cocoa plantations studied were damaged by wildlife, though there was high spatial variation. Of damaged pods where the animal group responsible could be identified, 87.2% of the damage was by monkeys, 11.1% by rats or squirrels and 1.7% by chimpanzees. Binomial mixed modelling of the proportion of pods damaged by wildlife indicated that this was higher closer to settlements and where pod density was lower. This indicates that the species causing the most damage in this system are disturbance-tolerant generalists which are not dependent on the protected forest, that mitigation measures should be concentrated where damage is highest, particularly close to settlements, and that increasing cocoa yield in these communities could offset damage by wildlife and therefore still be a viable option for, for example, REDD + projects, even where crop raiding is common.