Science Enabled by Specimen Data

Putra, A. R., K. A. Hodgins, and A. Fournier‐Level. 2023. Assessing the invasive potential of different source populations of ragweed (Ambrosia artemisiifolia L.) through genomically informed species distribution modelling. Evolutionary Applications.

The genetic composition of founding populations is likely to play a key role in determining invasion success. Individual genotypes may differ in habitat preference and environmental tolerance, so their ability to colonize novel environments can be highly variable. Despite the importance of genetic variation on invasion success, its influence on the potential distribution of invaders is rarely investigated. Here, we integrate population genomics and ecological niche models (ENMs) into a single framework to predict the distribution of globally invasive common ragweed (Ambrosia artemisiifolia) in Australia. We identified three genetic clusters for ragweed and used these to construct cluster‐specific ENMs and characterize within‐species niche differentiation. The potential range of ragweed in Australia depended on the genetic composition and continent of origin of the introduced population. Invaders originating from warmer, wetter climates had a broader potential distribution than those from cooler, drier ones. By quantifying this change, we identified source populations most likely to expand the ragweed distribution. As prevention remains the most effective method of invasive species management, our work provides a valuable way of ranking the threat posed by different populations to better inform management decisions.

Aguirre-Dugua, X., and A. Casas. 2023. Mesoamerica in a Bowl. Current Anthropology 64: 528–549.

Trees of the Neotropical genus Crescentia produce hard-shelled fruits used to manufacture bowls. In this work we analyze the role played by these vessels in the material culture of Mesoamerican peoples through archaeological, ethnohistorical (including 19 works and three tribute lists), and linguistic evidence (including 40 native languages). The earliest archaeobotanical record of Crescentia was found in Belize, estimated at least 2400 BP, whereas the first European description was made by Fernández de Oviedo in 1526. Historical texts written from the sixteenth to the nineteenth centuries tell that the main use of these vessels was as drinking cups (especially for cacao). Current ethnographic evidence reveals the validity of a close association between Crescentia bowls and traditional beverages based on cacao. Terms for designating these trees in 29 indigenous languages from eight linguistic families, with the oldest ones from the Amuzgo-Mixtec and Mixe-Zoquean lineages, confirm that Crescentia vessels constitute an entity clearly distinguishable from Lagenaria. New areas of ethnobotanical, ethnographic, and archaeological research are highlighted for understanding the role played by these vessels in utilitarian and symbolic aspects and the factors that support their persistence among Mesoamerican peoples up to the present.

Thongsangtum, N., J. Huang, S.-F. Li, Y. Thasod, and T. Su. 2023. Calophyllum (Calophyllaceae) from late Oligocene–Early Miocene of Li Basin, northern Thailand and its biogeographic and paleoclimatic implications. Palaeoworld.

Fossils from tropical Asia, which are far from fully investigated, are important for understanding the evolution of plant diversity and the associated surrounding environment there. In this study, we report, as the first record in Thailand, the well-preserved leaf fossils of Calophyllum Linnaeus (Calophyllaceae) from the upper Oligocene–Lower Miocene lacustrine deposits in Li Basin, northern Thailand. The fossils were identified through detailed comparison with leaves of extant and fossil species. These leaf fossils are assigned to Calophyllum based on several key leaf characteristics such as oblanceolate or oblong in shape and parallel secondary veins, nearly perpendicular to the midvein, as well as secondary veins alternate, closely placed, craspedodromous, parallel, dense, and distinct on surface, forming marginal veins. Based on detailed morphological comparison, these fossil leaves are assigned to C. suraikholaensis Awasthi and Prasad, 1990 and Calophyllum sp. The discovery of Calophyllum indicates a montane subtropical to tropical climate in northern Thailand during the Oligocene–Miocene. Together with previous fossil records, these results suggest that this genus probably originated in India during the Paleogene, and spread from India to Indochina during the Neogene, leading to its modern distribution, which currently prefers tropical climates.

Rodríguez-Merino, A. 2023. Identifying and Managing Areas under Threat in the Iberian Peninsula: An Invasion Risk Atlas for Non-Native Aquatic Plant Species as a Potential Tool. Plants 12: 3069.

Predicting the likelihood that non-native species will be introduced into new areas remains one of conservation’s greatest challenges and, consequently, it is necessary to adopt adequate management measures to mitigate the effects of future biological invasions. At present, not much information is available on the areas in which non-native aquatic plant species could establish themselves in the Iberian Peninsula. Species distribution models were used to predict the potential invasion risk of (1) non-native aquatic plant species already established in the peninsula (32 species) and (2) those with the potential to invade the peninsula (40 species). The results revealed that the Iberian Peninsula contains a number of areas capable of hosting non-native aquatic plant species. Areas under anthropogenic pressure are at the greatest risk of invasion, and the variable most related to invasion risk is temperature. The results of this work were used to create the Invasion Risk Atlas for Alien Aquatic Plants in the Iberian Peninsula, a novel online resource that provides information about the potential distribution of non-native aquatic plant species. The atlas and this article are intended to serve as reference tools for the development of public policies, management regimes, and control strategies aimed at the prevention, mitigation, and eradication of non-native aquatic plant species.

McCulloch-Jones, E. J., T. Kraaij, N. Crouch, and K. T. Faulkner. 2023. Assessing the invasion risk of traded alien ferns using species distribution models. NeoBiota 87: 161–189.

Risk analysis plays a crucial role in regulating and managing alien and invasive species but can be time-consuming and costly. Alternatively, combining invasion and impact history with species distribution models offers a cost-effective and time-efficient approach to assess invasion risk and identify species for which a comprehensive risk analysis should take precedence. We conducted such an assessment for six traded alien fern species, determining their invasion risk in countries where they are traded. Four of the species (Dicksonia antarctica, Dryopteris erythrosora, Lygodium japonicum, and Phlebodium aureum) showed limited global distributions, while Adiantum raddianum and Sphaeropteris cooperi had broader distributions. A. raddianum, however, was the only species found to pose a high invasion risk in two known trade countries – the USA and Australia – and requires a complete risk analysis to determine the appropriate regulatory responses. Dicksonia antarctica, Phlebodium aureum (for New Zealand), and Dryopteris erythrosora (for the USA) posed a medium risk of invasion due to the lack of evidence of impacts, and a complete risk analysis is thus deemed less crucial for these species in these countries. For other species, suitable environments were not predicted in the countries where they are traded, thus the risk of invasion is low, and a complete risk analysis is not required. For species in countries where suitable environments are predicted but no trade information or presence data are available, risk assessments are recommended to better determine the risk posed. Despite the relatively limited potential global distribution of the studied ferns relative to other major plant invaders (e.g., Pinus spp. and Acacia spp.), their history of invasion, documented impacts in pristine environments, and high propagule pressure from trade warrants concern, possibly necessitating legislative and regulatory measures in environmentally suitable regions.

Gachambi Mwangi, J., J. Haggar, S. Mohammed, T. Santika, and K. Mustapha Umar. 2023. The ecology, distribution, and anthropogenic threats of multipurpose hemi-parasitic plant Osyris lanceolata. Journal for Nature Conservation 76: 126478.

Osyris lanceolata Hochst. & Steud. ex A. DC. is a multipurpose plant with high socioeconomic and cultural values. It is endangered in the biogeographical region of eastern Africa, but of less concern in other regions where it occurs. The few natural populations remaining in the endangered sites continue to encounter many threats, and this has raised concerns about its long-term sustainability. Yet, existing knowledge about the ecology and distribution of the plant is scarce to inform strategies for the conservation and sustainable management of the species. In this study, we conducted a scoping review of the available literature on current knowledge about the plant. We recapitulated existing knowledge about the abiotic and biotic factors influencing the contemporary distribution of the plant, the anthropogenic threats, and existing conservation efforts. Based on the limited studies we reviewed, we identified that the plant prefers specific habitats (hilly areas and rocky outcrops), frequently parasitizes Fabaceae but can parasitize plants from a wide range of countries, have inadequate ex-situ propagation protocols which present issues for the survival of the species. Overharvesting from the wild driven by demand from regional and global markets poses further threats to the existing natural populations, especially in eastern Africa. A combination of ecological, social, and trade-related conservation measures can be envisioned to help improve the plant’s persistence. These include, but are not limited to, a better understanding of the species ecology to inform conservation planning, monitoring of trade flow and improve transnational environmental laws and cooperation among countries to prevent species smuggling.

Maurin, O., A. Anest, F. Forest, I. Turner, R. L. Barrett, R. C. Cowan, L. Wang, et al. 2023. Drift in the tropics: Phylogenetics and biogeographical patterns in Combretaceae. Global Ecology and Biogeography.

Aim The aim of this study was to further advance our understanding of the species-rich, and ecologically important angiosperm family Combretaceae to provide new insights into their evolutionary history. We assessed phylogenetic relationships in the family using target capture data and produced a dated phylogenetic tree to assess fruit dispersal modes and patterns of distribution. Location Tropical and subtropical regions. Time Period Cretaceous to present. Major Taxa Studied Family Combretaceae is a member of the rosid clade and comprises 10 genera and more than 500 species, predominantly assigned to genera Combretum and Terminalia, and occurring on all continents and in a wide range of ecosystems. Methods We use a target capture approach and the Angiosperms353 universal probes to reconstruct a robust dated phylogenetic tree for the family. This phylogenetic framework, combined with seed dispersal traits, biome data and biogeographic ranges, allows the reconstruction of the biogeographical history of the group. Results Ancestral range reconstructions suggest a Gondwanan origin (Africa/South America), with several intercontinental dispersals within the family and few transitions between biomes. Relative abundance of fruit dispersal types differed by both continent and biome. However, intercontinental colonizations were only significantly enhanced by water dispersal (drift fruit), and there was no evidence that seed dispersal modes influenced biome shifts. Main Conclusions Our analysis reveals a paradox as drift fruit greatly enhanced dispersal distances at intercontinental scale but did not affect the strong biome conservatism observed.

Hill, A., M. F. T. Jiménez, N. Chazot, C. Cássia‐Silva, S. Faurby, L. Herrera‐Alsina, and C. D. Bacon. 2023. Apparent effect of range size and fruit colour on palm diversification may be spurious. Journal of Biogeography.

Aim Fruit selection by animal dispersers with different mobility directly impacts plant geographical range size, which, in turn, may impact plant diversification. Here, we examine the interaction between fruit colour, range size and diversification rate in palms by testing two hypotheses: (1) species with fruit colours attractive to birds have larger range sizes due to high dispersal ability and (2) disperser mobility affects whether small or large range size has higher diversification, and intermediate range size is expected to lead to the highest diversification rate regardless of disperser. Location Global. Time Period Contemporary (or present). Major Taxa Studied Palms (Arecaceae). Methods Palm species were grouped based on likely animal disperser group for given fruit colours. Range sizes were estimated by constructing alpha convex hull polygons from distribution data. We examined disperser group, range size or an interaction of both as possible drivers of change in diversification rate over time in a likelihood dynamic model (Several Examined State-dependent Speciation and Extinction [SecSSE]). Models were fitted, rate estimates were retrieved and likelihoods were compared to those of appropriate null models. Results Species with fruit colours associated with mammal dispersal had larger ranges than those with colours associated with bird dispersal. The best fitting SecSSE models indicated that the examined traits were not the primary driver of the heterogeneity in diversification rates in the model. Extinction rate complexity had a marked impact on model performance and on diversification rates. Main Conclusions Two traits related to dispersal mobility, range size and fruit colour, were not identified as the main drivers of diversification in palms. Increased model extinction rate complexity led to better performing models, which indicates that net diversification should be estimated rather than speciation alone. However, increased complexity may lead to incorrect SecSSE model conclusions without careful consideration. Finally, we find palms with more mobile dispersers do not have larger range sizes, meaning other factors are more important determinants of range size.

Lima, V. P., R. A. Ferreira de Lima, F. Joner, L. D’Orangeville, N. Raes, I. Siddique, and H. ter Steege. 2023. Integrating climate change into agroforestry conservation: A case study on native plant species in the Brazilian Atlantic Forest. Journal of Applied Ecology.

Designing multispecies systems with suitable climatic affinity and identifying species' vulnerability under human‐driven climate change are current challenges to achieve successful adaptation of natural systems. To address this problem, we need to (1) identify groups of species with climatic similarity under climate scenarios and (2) identify areas with high conservation value under predicted climate change.To recognize species with similar climatic niche requirements that can be grouped for mixed cropping in Brazil, we employed ecological niche models (ENMs) and Spearman's ρ for overlap. We also used prioritization algorithms to map areas of high conservation value using two Shared Socioeconomic Pathways (SSP2‐4.5 and SSP5‐8.5) to assess mid‐term (2041–2060) and long‐term (2061–2080) climate change impacts.We identified 15 species groups with finer climatic affinities at different times depicted on hierarchical clustering dendrograms, which can be combined into agroecological agroforestry systems. Furthermore, we highlight the climatically suitable areas for these groups of species, thus providing an outlook of where different species will need to be planted over time to be conserved. In addition, we observed that climate change is predicted to modify the spatial association of these groups under different future climate scenarios, causing a mean negative change in species climatic similarity of 9.5% to 13.7% under SSP2‐4.5 scenario and 9.5% to 10.5% under SSP5‐8.5, for 2041–2060 and 2061–2080, respectively.Synthesis and applications. Our findings provide a framework for agroforestry conservation. The groups of species with finer climatic affinities identified and the climatically suitable areas can be combined into agroecological productive systems, and provide an outlook of where different species may be planted over time. In addition, the conservation priority zones displaying high climate stability for each species individually and all at once can be incorporated into Brazil's conservation plans by policymakers to prioritize specific sites. Lastly, we urge policymakers, conservation organizations and donors to promote interventions involving farmers and local communities, since the species' evaluated have proven to maintain landscapes with productive forest fragments and can be conserved in different Brazilian ecosystems.

APÉLÉTÉ, E.-E. 2023. Modeling of the Ecological Niche of Anogeissus leiocarpa (DC.) Guill & Perr and Conservation Strategies in the Context of Climate and Global Change (Benin, West Africa). Journal of Ecology & Natural Resources 7.

The objective of this work is to study the ethno botanical importance of Anogeissus leiocarpa and the potential impacts of climate and global changes on the spatial distribution of the species in order to contribute to its conservation and sustainable use. One hundred and eighty-nine (189) peoples were surveyed in the ten phytodistricts of Benin. Occurrences of Anogeissus leiocarpa downloaded from the Global Biodiversity Information Facility (GBIF) website (; dl.qgwnvf) was supplemented with those collected in the field to model the spatial distribution and the ecological niche of the species. Environmental climatic data were downloaded from Worldclim and Africlim website at the resolution of 2.5 minutes; non-climatic environmental data as soil, population and distance to dwellings (Settlement) were respectively downloaded from ISRIC and SEDAC website at the same resolution. The results of five modeling algorithms were compared: Maxent, BRT, RF, GLM, and GAM. From the main results, Anogeissus leiocarpa is well known and variously used by the surveyed population. Three categories of use were named: wood use (64 %), medicinal use (35 %) and spiritual or medico-magical use (1 %). The most named parts of the plants are the trunk and the leaves. Seven (7) forms of usage were named: service wood, decoction, timber, fuelwood, power, toothpick and trituration. Maxent and BRT algorithms have shown the best performance to predict suitable areas of Anogeissus leiocarpa (compared to RF, GLM and GAM) and were therefore combined to define conservation strategies for the species. Globally, there is an extension of the new suitable areas of the species. The suitable areas of the species are seldom threatened by climate change in Africa and Benin. Also, the protected areas of Benin will remain effective for the conservation of the species in the present and in the future.