Science Enabled by Specimen Data

Williams, C. J. R., Lunt, D. J., Salzmann, U., Reichgelt, T., Inglis, G. N., Greenwood, D. R., Chan, W., Abe‐Ouchi, A., Donnadieu, Y., Hutchinson, D. K., Boer, A. M., Ladant, J., Morozova, P. A., Niezgodzki, I., Knorr, G., Steinig, S., Zhang, Z., Zhu, J., Huber, M., & Otto‐Bliesner, B. L. (2022). African hydroclimate during the early Eocene from the DeepMIP simulations. Paleoceanography and Paleoclimatology. Portico.

The early Eocene (∼56‐48 million years ago) is characterised by high CO2 estimates (1200‐2500 ppmv) and elevated global temperatures (∼10 to 16°C higher than modern). However, the response of the hydrological cycle during the early Eocene is poorly constrained, especially in regions with sparse data coverage (e.g. Africa). Here we present a study of African hydroclimate during the early Eocene, as simulated by an ensemble of state‐of‐the‐art climate models in the Deep‐time Model Intercomparison Project (DeepMIP). A comparison between the DeepMIP pre‐industrial simulations and modern observations suggests that model biases are model‐ and geographically dependent, however these biases are reduced in the model ensemble mean. A comparison between the Eocene simulations and the pre‐industrial suggests that there is no obvious wetting or drying trend as the CO2 increases. The results suggest that changes to the land sea mask (relative to modern) in the models may be responsible for the simulated increases in precipitation to the north of Eocene Africa. There is an increase in precipitation over equatorial and West Africa and associated drying over northern Africa as CO2 rises. There are also important dynamical changes, with evidence that anticyclonic low‐level circulation is replaced by increased south‐westerly flow at high CO2 levels. Lastly, a model‐data comparison using newly‐compiled quantitative climate estimates from palaeobotanical proxy data suggests a marginally better fit with the reconstructions at lower levels of CO2.

Tazikeh, S., Zendehboudi, S., Ghafoori, S., Lohi, A., & Mahinpey, N. (2022). Algal Bioenergy Production and Utilization: Technologies, Challenges, and Prospects. Journal of Environmental Chemical Engineering, 107863.

Increasing demand for energy and also escalating environmental pollution show that industries cannot rely on fossil fuels, and it is necessary to adopt an alternative. In recent decades, algal bioenergy has emerged as a renewable energy source in different industries. However, algal bioenergy production is costly and faces different challenges and unknown aspects that need to be addressed. Experimental and theoretical research works have revealed that the efficiency of algal bioenergy production is influenced by several factors, including algae species, temperature, light, CO2, cultivation method, and available nutrients. Algal bioenergy production on commercial scales in cost-effective ways is the main aim of industries to compete with fossil fuels. Hence, it is vital to have a comprehensive knowledge of the previous findings and attain a suitable pathway for future studies/activities. In the present review paper, the potential of microalgae bioenergy production, influential parameters, previous experimental and theoretical studies, and different methods for microalgae biofuel production from cultivation stage to utilization are reviewed. Moreover, this work discusses the engineering activities and economic analysis of microalgae cultivation to utilization, and also useful suggestions are made for future research works. The outcomes of the present work confirm that innovative engineering methods can overcome scale-up challenging, increase the rate of production, and decrease the cost of algae bioenergy production. Hence, there is no long way to produce cost-effective algae bioenergy on commercial scales.

Li, D., Li, Z., Wang, X., Wang, L., Li, Y., & Liu, D. (2022). Increasing risk of aphids spreading plant viruses in maize fields on both sides of China’s Heihe‐Tengchong line under climate change. Pest Management Science. Portico.

BACKGROUND In the coming decades, geographical distribution patterns of farmland organisms may undergo drastic changes due to climate change, with significant implications for global food security. In China, Rhopalosiphum maidis and its spread of sugarcane mosaic virus (ScMV) can become an increasingly serious threat to maize (Zea mays) production. We conducted ecological niche modeling for Z. mays, R. maidis, and ScMV under current and future (2041–2060 and 2081–2100) climate scenarios by using MaxEnt software to explore changes in this system. RESULTS The Heihe-Tengchong line (an imaginary separation line of human population density) can divide China into main (east of the line) and secondary (west of the line) habitats for the three species. With climate change, rapid expansion in suitable areas is projected for ScMV and the aphid vector R. maidis. Taking species interactions into consideration, our overlaying analyses show that most areas east of the Heihe-Tengchong line (optimal for maize and suitable for R. maidis) will become increasingly highly suitable for ScMV, suggesting that the prevention and control of this plant virus and its aphid vector in China's main maize-growing areas (e.g. northeast) will become an increasing challenge in the future. CONCLUSION Climate change will profoundly affect ScMV–vector–maize interactions, which may contribute favorably to invasion of this virus into new areas. Our comprehensive and in-depth analyses on shifts in this multi-species system under climate change provide useful and insightful information for devising strategies for the prevention and control of plant viruses and aphid vectors on maize in the future. © 2022 Society of Chemical Industry.

Bywater‐Reyes, S., Diehl, R. M., Wilcox, A. C., Stella, J. C., & Kui, L. (2022). A Green New Balance: interactions among riparian vegetation plant traits and morphodynamics in alluvial rivers. Earth Surface Processes and Landforms. Portico.

The strength of interactions between plants and river processes is mediated by plant traits and fluvial conditions, including above‐ground biomass, stem density and flexibility, channel and bed material properties, and flow and sediment regimes. In many rivers, concurrent changes in 1) the composition of riparian vegetation communities as a result of exotic species invasion and 2) shifts in hydrology have altered physical and ecological conditions in a manner that has been mediated by feedbacks between vegetation and morphodynamic processes. We review how Tamarix, which has invaded many U.S. Southwest waterways, and Populus species, woody pioneer trees that are native to the region, differentially affect hydraulics, sediment transport, and river morphology. We draw on flume, field, and modeling approaches spanning the individual seedling to river‐corridor scales. In a flume study, we found differences in the crown morphology, stem density, and flexibility of Tamarix compared to Populus influenced near‐bed flow velocities in a manner that favored aggradation associated with Tamarix. Similarly, at the patch and corridor scales, observations confirmed increased aggradation with increased vegetation density. Furthermore, long‐term channel adjustments were different for Tamarix‐ versus Populus‐dominated reaches, with faster and greater geomorphic adjustments for Tamarix. Collectively, our studies show how plant‐trait differences between Tamarix and Populus, from individual seedlings to larger spatial and temporal scales, influence the co‐adjustment of rivers and riparian plant communities. These findings provide a basis for predicting changes in alluvial riverine systems which we conceptualize as a Green New Balance model that considers how channels may adjust to changes in plant traits and community structure in additional to alterations in flow and sediment supply. We offer suggestions regarding how the Green New Balance can be used in management and invasive species management.

Chevalier, M. (2022). <i>crestr</i>: an R package to perform probabilistic climate reconstructions from palaeoecological datasets. Climate of the Past, 18(4), 821–844.

Abstract. Statistical climate reconstruction techniques are fundamental tools to study past climate variability from fossil proxy data. In particular, the methods based on probability density functions (or PDFs) can be used in various environments and with different climate proxies because they rely on elementary calibration data (i.e. modern geolocalised presence data). However, the difficulty of accessing and curating these calibration data and the complexity of interpreting probabilistic results have often limited their use in palaeoclimatological studies. Here, I introduce a new R package (crestr) to apply the PDF-based method CREST (Climate REconstruction SofTware) on diverse palaeoecological datasets and address these problems. crestr includes a globally curated calibration dataset for six common climate proxies (i.e. plants, beetles, chironomids, rodents, foraminifera, and dinoflagellate cysts) associated with an extensive range of climate variables (20 terrestrial and 19 marine variables) that enables its use in most terrestrial and marine environments. Private data collections can also be used instead of, or in combination with, the provided calibration dataset. The package includes a suite of graphical diagnostic tools to represent the data at each step of the reconstruction process and provide insights into the effect of the different modelling assumptions and external factors that underlie a reconstruction. With this R package, the CREST method can now be used in a scriptable environment and thus be more easily integrated with existing workflows. It is hoped that crestr will be used to produce the much-needed quantified climate reconstructions from the many regions where they are currently lacking, despite the availability of suitable fossil records. To support this development, the use of the package is illustrated with a step-by-step replication of a 790 000-year-long mean annual temperature reconstruction based on a pollen record from southeastern Africa.

Sarker, U., Lin, Y.-P., Oba, S., Yoshioka, Y., & Hoshikawa, K. (2022). Prospects and potentials of underutilized leafy Amaranths as vegetable use for health-promotion. Plant Physiology and Biochemistry.

Climate change causes environmental variation worldwide, which is one of the most serious threats to global food security. In addition, more than 2 billion people in the world are reported to suffer from serious malnutrition, referred to as ‘hidden hunger.’ Dependence on only a few crops could lead to the loss of genetic diversity and high fragility of crop breeding in systems adapting to global scale climate change. The exploitation of underutilized species and genetic resources, referred to as orphan crops, could be a useful approach for resolving the issue of adaptability to environmental alteration, biodiversity preservation, and improvement of nutrient quality and quantity to ensure food security. Moreover, the use of these alternative crops will help to increase the human health benefits and the income of farmers in developing countries. In this review, we highlight the potential of orphan crops, especially amaranths, for use as vegetables and health-promoting nutritional components. This review highlights promising diversified sources of amaranth germplasms, their tolerance to abiotic stresses, and their nutritional, phytochemical, and antioxidant values for vegetable purposes. Betalains (betacyanins and betaxanthins), unique antioxidant components in amaranth vegetables, are also highlighted regarding their chemodiversity across amaranth germplasms and their stability and degradation. In addition, we discuss the physiological functions, antioxidant, antilipidemic, anticancer, and antimicrobial activities, as well as the biosynthesis pathway, molecular, biochemical, genetics, and genomic mechanisms of betalains in detail.

Afonin, A. N., Baranova, O. G., Fedorova, Y. A., Abramova, L. M., Boshko, T. F., Kotsareva, N. V., Li, Yu. S., Milyutina, E. A., Pikalova, N. A., Prokhorov, V. E., & Senator, S. A. (2022). ECOLOGICAL AND GEOGRAPHICAL POTENTIAL OF <i>AMBROSIA ARTEMISIIFOLIA</i> L. DISTRIBUTION TO THE NORTH OF THE EUROPEAN RUSSIA BASED ON A COMPARISON OF THE NORTHERN BOUNDARIES OF THE PRIMARY AND SECONDARY RANGES. Russian Journal of Biological Invasions, 15(1), 2–12.

В ходе экспедиционных исследований уточнена современная фактическая граница натурализации Аmbrosia artemisiifolia на Европейской территории России. Эта граница проходит по югу Брянской, Курской и Саратовской, северу Воронежской областей. Общая протяжённость экспедиционных маршрутов составила около 8900 км, количество обследованных точек – 777. В целях выявления потенциала дальнейшего продвижения вида на север проведён сравнительный эколого-географический анализ и моделирование распространения амброзии на севере её вторичного ареала на Европейской территории России и первичного – в Канаде. Выявлено, что основным фактором, лимитирующим продвижение вида на север, служит недостаточная теплообеспеченность периода созревания семян. Для определения эколого-географической ниши амброзии была составлена глобальная карта распределения сумм активных температур с порогом выше 10 °С за период от даты перехода длины дня через 14 часов после летнего солнцестояния до устойчивого перехода осенних температур через 0 °С (САТфп). Было определено значение САТфп на самых северных точках натурализации Аmbrosia artemisiifolia на Европейской территории России и в Канаде. Сравнение эколого-географических границ по фактору теплообеспеченности на Европейской территории России и в Канаде показало, что реализованная видом эколого-географическая ниша на Североамериканском континенте в настоящее время в целом шире, чем на Европейской территории России. Рассмотрены возможные причины, по которым амброзия не освоила всю потенциальную экологическую нишу на Европейской территории России, сделаны предположения о возможности дальнейшего продвижения вида на север. Амброзия по фактору теплообеспеченности на Европейской территории России может продвинуться дальше на север – в Брянскую, Орловскую, Липецкую, Тамбовскую, Саратовскую, Оренбургскую, южную половину Пензенской, юг Ульяновской, Самарской областей и Башкортостана. Дополнительные проблемы с продвижением вида в северо-восточном направлении на Европейской территории России могут быть обусловлены сопряжённым неблагоприятным воздействием дополнительного фактора – недостаточной влагообеспеченности, поскольку от Саратовской области и восточнее амброзия на северном пределе распространения находится в зоне экологического пессимума одновременно по показателям тепло- и влагообеспеченности.

Eduardo Sáenz-Ceja, J., Arenas-Navarro, M., & Torres-Miranda, A. (2022). Prioritizing conservation areas and vulnerability analyses of the genus Pinus L. (Pinaceae) in Mexico. Journal for Nature Conservation, 67, 126171.

Mexico hosts the highest species richness of pines (Pinus, Pinaceae) worldwide; however, the priority areas for their conservation in the country are unknown. In this study, the ecological niche of the 50 native pine species was modeled. Then, through a multi-criteria analysis, the priority areas for the conservation of the genus Pinus were identified according to the spatial patterns of richness, geographic rareness, irreplaceability, the level of vulnerability of their habitat and the status of legal protection. The results revealed that the regions with high species richness differed from those with high endemism. Also, most pine species have undergone processes of habitat degradation, having been the endemic species the most affected. The priority areas covered regions with high species richness, high endemism, and highly degraded forests, located at mountainous portions of the Baja California Peninsula, the Sierra Madre Occidental, the Sierra Madre Oriental, the Trans-Mexican Volcanic Belt, and the Sierra Madre del Sur. A low proportion of priority areas overlapped with protected areas or terrestrial regions considered priorities for biological conservation. These results suggest that conservation efforts for this genus should be focused beyond regions with high species richness and current protected areas. Besides, the priority areas identified in this study can be the basis to create biological corridors and new protected areas, which could contribute significantly to the conservation of this genus in Mexico.

Mercado, M. A., & Studer, A. J. (2022). Meeting in the Middle: Lessons and Opportunities from Studying C3-C4 Intermediates. Annual Review of Plant Biology, 73(1).

The discovery of C3-C4 intermediate species nearly 50 years ago opened up a new avenue for studying the evolution of photosynthetic pathways. Intermediate species exhibit anatomical, biochemical, and physiological traits that range from C3 to C4. A key feature of C3-C4 intermediates that utilize C2 …

Filartiga, A. L., Klimeš, A., Altman, J., Nobis, M. P., Crivellaro, A., Schweingruber, F., & Doležal, J. (2022). Comparative anatomy of leaf petioles in temperate trees and shrubs: the role of plant size, environment and phylogeny. Annals of Botany.

Background and Aims Petioles are important plant organs connecting stems with leaf blades and affecting light-harvesting ability of the leaf as well as transport of water, nutrients and biochemical signals. Despite the high diversity in petiole size, shape and anatomy, little information is availabl…