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Fig. 4. A–B in A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa

Fig. 4. A–B. Mesosoma in dorsal view. A. T. signatum Emery, 1895 (SAM-HYM-C020573). B. T. glabratum Stitz, 1923 (SAM-HYM-C024395). C–D. Antennal scape in frontal view. C. T. aisha Mbanyana, Robertson & Hita Garcia sp. nov. (CASENT0250969). D. T. peringueyi Arnold, 1926 (SAM-HYM-C026796). E–F. Mesosoma in dorsal view. E. T. peringueyi (CASENT0250873). F. T. margueriteae Mbanyana, Robertson & Hita Garcia sp. nov. (SAM-NC07-012). G–H. Body in profile. G. T. peringueyi (CASENT0250873). H. T. margueriteae sp. nov. (SAM-HYM-C019839). I–L. Mesosoma in profile. I. T. dichroum Santschi, 1932 (CASENT0746320). J. T. brigitteae Mbanyana, Robertson & Hita Garcia sp. nov. (SAM-HYM-C027040). K. T. solidum Emery, 1886 (CASENT0250960). L. T. aisha sp. nov. (CASENT0250969).

Fig. 3. A–B. Waist segments and gaster oblique lateral view. A. T. setuliferum Emery, 1895 in A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa

Fig. 3. A–B. Waist segments and gaster oblique lateral view. A. T. setuliferum Emery, 1895 (MCZ_ ENT00512567). B. T. clunum Forel, 1913 (CASENT0764600). C–F. Waist segments in dorsal view. C. T. grandinode Santschi, 1913 (CASENT0764655). D. T. lerouxi Mbanyana, Robertson & Hita Garcia sp. nov. (SAM-HYM-C023329). E. T. signatum Emery, 1895 (SAM-HYM-C020573). F. T. glabratum Stitz, 1923 (SAM-HYM-C024395). G–I. Mesosoma in profile. G. T. jordani Santschi, 1937 (CASENT0248475). H. T. glabratum (SAM-HYM-C024395). I. T. rufescens Stitz, 1923 (CASENT0250852). J–M. Head in full-face view. J. T. barbigerum Bolton, 1980 (CASENT0901181). K. T. pogonion Bolton, 1980 (CASTYPE13390 – Antweb, photographer unknown). L. T. glabratum (SAM-HYM-C024395). M. T. rufescens (CASENT0250852). N–P. Waist segments in profile. N. T. duncani Mbanyana, Robertson & Hita Garcia sp. nov. (SAM-HYM-C027003). O. T. glabratum (SAM-HYM-C024395). P. T. rufescens (CASENT0250852).

Fig. 14. Tetramorium jordani Santschi, 1937 in A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa

Fig. 14. Tetramorium jordani Santschi, 1937 (CASENT0248475). A. Body in profile. B. Body in dorsal view. C. Head in full-face view.

Fig. 17. Tetramorium peringueyi Arnold, 1926 in A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa

Fig. 17. Tetramorium peringueyi Arnold, 1926 (CASENT0250873). A. Body in profile. B. Body in dorsal view. C. Head in full-face view.

Fig. 1 in A taxonomic revision of seed harvester ants of the Tetramorium solidum group (Hymenoptera: Formicidae) in southern Africa

Fig. 1. Schematic line drawings of a T. solidum group species illustrating the used measurements. A. Body in profile with measuring lines for EL, WL, PH, PTH and PPH. B. Mesosoma in dorsal view with measuring line for PW. C. Petiole and postpetiole in dorsal view with measuring lines for PTL, PTW, PPL and PPW. D. Head in full-face view with measuring lines for HL, HW and SL. E. Dorsocaudal view of the propodeum with measuring line for PSL.

opencc-zeroAug 2016View details →

Morphology and load transport behaviour of the seed-harvesting ant Messor barbarus Linnaeus 1767

This Excel file contains two datasets. The first dataset (sheet “Morphometric data”) gives the measure of thorax length, body mass as well as the mass of main body segments of 57 individual workers of the ant species Messor barbarus Linnaeus 1767.  The workers originated from a colony collected in Saint-Hippolyte, France (42°80 N, 2°98 E) in October 2013. The second dataset (sheet “Transportation data”) relates to observations aiming at investigating the efficiency of M. barbarus workers when transporting pieces of dry pasta on their foraging trails. The data gives the body mass, the characteristics of the item transported, the transportation method (carry or drag), as well as the time required to travel a distance of 1m for 239 individual workers from five colonies located on the campus of the Universitat Autònoma de Barcelona, Spain (41°30′00N, 2°06′49E). For each ant followed the air temperature at ground level is also indicated.

opencc-by-4.0Mar 2024View details →

Data repository for Global wood harvest is sufficient for climate-friendly transitions to timber cities

Supplementary Information S2 Global wood harvest is sufficient for climate-friendly transitions to timber cities | <a href="https://doi.org/10.1038/s41893-025-01605-w" target="_blank" rel="noopener">Nature Sustainability</a> Alperen Yayla 1,a; Adam R. Mason 1,b; Junyang Wang 1,2,c; Stijn van Ewijk 3,d; Rupert J. Myers 1,e,* 1 Department of Civil and Environmental Engineering, Imperial College London, London SW7 2AZ, United Kingdom 2 Department of Mathematics, Imperial College London, London, SW7 2AZ, United Kingdom 3 Department of Civil, Environmental & Geomatic Engineering, University College London, London, WC1E 6BT, United Kingdom * Corresponding author a <a href="mailto:a.yayla22@imperial.ac.uk">a.yayla22@imperial.ac.uk</a>, b <a href="mailto:a.mason19@imperial.ac.uk">a.mason19@imperial.ac.uk</a>, c <a href="mailto:junyang.wang21@imperial.ac.uk">junyang.wang21@imperial.ac.uk</a>, d <a href="mailto:s.vanewijk@ucl.ac.uk">s.vanewijk@ucl.ac.uk</a>, e <a href="mailto:r.myers@imperial.ac.uk">r.myers@imperial.ac.uk</a>.

opencc-zeroNov 2023View details →

Non-trophic interactions amplify kelp harvest-induced biomass oscillations and biomass changes in a kelp forest ecological network model

Kelp forests are important marine ecosystems providing habitat for numerous species. Despite over 50 years of mechanical harvesting in the Northeast Atlantic, the indirect impacts of kelp harvesting and associated habitat loss on faunal species within kelp forests remain poorly understood. We investigated the consequences of kelp harvesting by developing an allometric trophic network model for a subtidal Northeast Atlantic kelp forest (dominated by Laminaria hyperborea). Additionally, we designed a novel mechanistic model to explore the non-trophic interactions between kelp and age class 0 Atlantic cod (Gadus morhua) and kelp and European lobster (Homarus gammarus), specifically focusing on the increased survival benefits provided by the kelp habitat. Simulations were conducted over a 50-year period, incorporating harvesting cycles of 2, 5, and 9 years, as well as low and high harvesting intensities. Our findings reveal the complex dynamics resulting from kelp harvesting. The recovery of kelp biomass was observed with 5- and 9-year harvesting cycles, whereas a decline was observed with a 2-year cycle. Furthermore, the non-trophic interaction facilitated a higher pre-harvest biomass for both the European lobster and the Atlantic cod compared to scenarios without this interaction. These results highlight the multitrophic effects of kelp harvesting and emphasize that the recovery of kelp-associated species may not necessarily align with kelp recovery, depending on harvesting intensity and recovery periods. Importantly, our study contributes to a better understanding of the ecological consequences of kelp harvesting and underscores the need for sustainable management practices to mitigate habitat loss in kelp ecosystems.

opencc-by-4.0Dec 2023View details →

An energy harvester based on UV-polymerized short-alkyl-chain-modified [DBU][TFSI] ionic liquid electrets

This dataset contains the measurement data for figures published in the journal article:  An energy harvester based on UV-polymerized short-alkyl-chain-modified [DBU][TFSI] ionic liquid electrets (https://doi.org/10.1039/D3TA05448A) by Topias Järvinen, Nemanja Vucetic, Petra Palvölgyi, Olli Pitkänen, Tuomo Siponkoski, Helene Cabaud, Robert Vajtai, Jyri-Pekka Mikkola and Krisztian Kordas

opencc-zeroMar 2024View details →

Data from: Energy harvesting in a flow-induced vibrating flapper with biomimetic gaits

Energy harvesting from flow induced vibrations (FIV) in flexible bodies offer opportunities for power generation in biomimicking robotic devices and is an active area of research. The focus of this study is on investigating the underlying physics and qualitatively analysing the energy extraction scenarios in similar structural systems, comprising of a flexible piezoelectric flapper in a low Reynolds number flow regime. A high-fidelity three-way fully coupled fluid-structure-electric energy solver is developed in-house to study the energy harvesting capabilities of such a flapper, its hydrodynamic characteristics and the associated unsteady flow-field. The results indicate that the flapper deformation profiles at the most efficient harvesting regimes, resemble the propulsion gaits of natural swimmers. Investigations on the effects of a sinusoidal heaving actuation reveal no significant impact on the harvested power at the high yield (high power output) regime, identified under the passive condition showing biomimetic gait. This study provides mechanics based insights that is expected to be useful for bio-inspired designs of FIV based harvesters.

opencc-zeroMar 2024View details →

Data for: Harvest and decimation affect genetic drift and the effective population size in wild reindeer

Harvesting and culling are methods used to monitor and manage wildlife diseases. An important consequence of these practices is a change in the genetic dynamics of affected populations that may threaten their long-term viability. The effective population size (Ne) is a fundamental parameter for describing such changes as it determines the amount of genetic drift in a population. Here, we estimate Ne of a harvested wild reindeer population in Norway. Then we use simulations to investigate the genetic consequences of management efforts for handling a recent spread of chronic wasting disease, including increased adult male harvest and population decimation. The Ne/N ratio in this population was found to be 0.124 at the end of the study period, compared to 0.239 in the preceding 14-year period. The difference was caused by increased harvest rates with a high proportion of adult males (older than 2.5 years) being shot (15.2 % in 2005-2018 and 44.8 % in 2021). Increased harvest rates decreased Ne in the simulations, but less sex-biased harvest strategies had a lower negative impact. For harvest strategies that yield stable population dynamics, shifting the harvest from calves to adult males and females increased Ne. Population decimation always resulted in decreased genetic variation in the population, with higher loss of heterozygosity and rare alleles with more severe decimation or longer periods of low population size. A very high proportion of males in the harvest had the most severe consequences for the loss of genetic variation. This study clearly shows how the effects of harvest strategies and changes in population size interact to determine the genetic drift of a managed population. The long-term genetic viability of wildlife populations subject to disease will also depend on the population impacts of the disease and how these interact with management actions.

opencc-zeroNov 2021View details →

Lesser Yellowlegs location data describing the occurrence of birds within harvest zones in the Caribbean and South America

Shorebirds have experienced a precipitous reduction in abundance over the past four decades. While some threats to shorebirds are widespread (e.g. habitat alteration), others are regional and may affect specific populations. Lesser Yellowlegs (Tringa flavipes) are long-distance migrants that breed across the North American boreal biome and have declined in abundance by 60-80% since the 1970s. The documented harvest of Lesser Yellowlegs in the Caribbean and northeastern South America during southward migration is a possible limiting factor for the species, but it is unknown to what extent birds from different breeding origins may be affected. To address the question of differential occurrence in harvest zones during southward migration, we used PinPoint GPS Argos transmitters to track the southward migrations of 85 adult Lesser Yellowlegs from across the species' breeding range and 80° of longitude from Anchorage, Alaska, USA to the Mingan Archipelago, Quebec, Canada. We classified migratory locations as inside or outside three zones with high levels of harvest (Caribbean, coastal Guianas, and coastal Brazil) and then fit generalized additive mixed models to estimate the probability of occurrence of Lesser Yellowlegs in harvest zones according to their breeding origin. Individuals from the Eastern Canada population had a higher probability of occurrence within one or more harvest zones and remained in those zones longer than individuals breeding in Alaska and western Canada. Linear regressions also suggested that longitude of the breeding origin is an important predictor of occurrence in harvest zones during southward migration. Lastly, our findings, combined with other sources of evidence, suggest that current estimated harvest rates may exceed sustainable limits for Lesser Yellowlegs, which warrants further investigation.

opencc-by-4.0Aug 2021View details →

Computational results for the publication "Evolution of water structures in metal-organic frameworks for improved atmospheric water harvesting"

This upload contains the computationally obtained atomic coordinates for MOF-303 and MOF-333 at different water loadings.

opencc-by-4.0Mar 2022View details →

Time-synchronized Energy Harvesting Traces

32h of time-synchronized energy-harvesting traces from 5 different scenarios involving solar panels and piezoelectric harvesters. The data was recorded with, a measurement tool that records time-synchronized voltage and current traces from one or more energy-harvesting nodes with high rate and resolution. <ul> <li>The jogging dataset comprises traces from two participants, each equipped with two piezoelectric harvester at the ankles and a solar panel at the left wrist. The two participants run together for an hour in a public park, including short walking and standing breaks.</li> <li>For the stairs dataset, we recorded traces from six solar panels that are embedded into the surface of an outdoor stair in front of a lecture hall. Over the course of one hour, numerous students pass the stairs, leading to temporary shadowing effects on some or all of the solar panels.</li> <li>The office dataset comprises traces from five solar panels mounted on the doorframe and walls of an office with fluorescent lights. During the one-hour recording, people enter and leave the office and operate the lights.</li> <li>The cars dataset contains traces from two cars. Each car is equipped with three piezoelectric harvesters mounted on the windshield, the dashboard, and in the trunk. The cars drive for two hours in convoy over a variety of roads.</li> <li>The washer dataset includes five traces from piezoelectric harvesters mounted on a WPB4700H industrial washing machine, while the machine runs a washing program with maximum load for 45 minutes.</li> </ul>

opencc-by-4.0Dec 2021View details →

A taxonomic revision and a review of the biology of the North American seed-harvester ant genus Veromessor (Hymenoptera: Formicidae: Myrmicinae)

Detailed collection and locality information for all material examined in the manuscript for "A taxonomic revision and a review of the biology of the North American seed-harvester ant genus Veromessor (Hymenoptera: Formicidae: Myrmicinae)". File "Robert_A_Johnson_collection.xlsx" contains records in the senior author's collection and "Veromessor_specimens_examined.xlsx" include records from all other collections. The two files differ in headers, format.

opencc-by-4.0Jan 2019View details →

Fig. 4 in Length-Weight Relationships And Condition Factors Of The Naleh Fish Barbonymus Gonionotus (Pisces, Cyprinidae) Harvested From Nagan Raya Waters, Indonesia

Fig. 4. Comparison of observed and predicted growth for B. gonionotus males (a) and females (b) sampled during January 2017 to December 2017. Total number of FIsh = 135 females, 626 males. Predicted growth curve for males, y = 0.317x – 20.3 R2 = 0.970, and for females: y = 0.330x – 21.40, R2 = 0.979.

opencc-by-4.0Jan 2019View details →

Fig. 3. Length-weight relationship for B in Length-Weight Relationships And Condition Factors Of The Naleh Fish Barbonymus Gonionotus (Pisces, Cyprinidae) Harvested From Nagan Raya Waters, Indonesia

Fig. 3. Length-weight relationship for B. gonionotus males (a) and females (b) sampled from January 2017 to December 2017. Observed growth curve of B. gonionotus males, y = 2.8001x – 10.542, R2 = 0.9022, and females, y= 2.7744x – 10.393, R2= 0.9265.

opencc-zeroMay 2022View details →

Predicting harvest impact and establishment success when translocating highly mobile and endangered species

Harvesting individuals for translocations can negatively impact source populations, a critical challenge for species reduced to small populations. Consequently, translocation cohorts often remain small, reducing the establishment probability at the destination. Balancing the potential benefits and risks of such translocations is further complicated by philopatry and natural metapopulation dynamics if the target species is highly mobile. These challenges highlight the importance of translocation feasibility assessments, but such assessments often remain qualitative to date. The critically endangered Kuaka (Whenua Hou Diving Petrel; Pelecanoides whenuahouensis) is a philopatric, highly mobile seabird that could benefit from conservation translocations, but only one small population remains. Through expert elicitations with a user-friendly Shiny app, we developed a novel metapopulation extension to an integrated population model fitted to long-term data, allowing us to simultaneously project harvest impact on the source and establishment of destination populations under alternative translocation scenarios, while accounting for philopatry and metapopulation dynamics. Establishment of a destination population without excessive impact on the source was possible, but subject to uncertainty about philopatry and metapopulation dynamics. Accounting for juveniles returning to the source post-translocations reduced impact on the source, but also decreased establishment at the destination. Natural movements of adults and juveniles between source and destination populations were predicted to modulate effects of different harvest intensities. Synthesis and application: Using state-of-the art integrated population models and expert elicitations, we illustrate how translocation feasibility can be evaluated transparently and quantitatively, even when targeting endangered, philopatric, and highly mobile species. Our approach is a considerable improvement on current qualitative feasibility assessments. However, we also illustrate that, ultimately, the favoured translocation strategy depends on balancing biological and other fundamental objectives inherent to translocations. Therefore, the ideal strategy cannot be determined solely mathematically, and feasibility assessments should incorporate explicit value statements. Our methodology is applicable to any future translocation scenario.

opencc-zeroMay 2022View details →

X-ray imaging of 30 year old wine grape wood reveals cumulative impacts of rootstocks on scion secondary growth and harvest index

Annual rings from vines in a 30 year old, California rootstock trial were measured to determine the effects of 15 different rootstocks on Chardonnay and Cabernet Sauvignon scions. Viticultural traits measuring vegetative growth, yield, berry quality, and nutrient uptake were measured at the beginning and end of the lifetime of the vineyard. X-ray Computed Tomography (CT) was used to measure ring widths in 103 vines. Ring width was modeled as a function of ring number using a negative exponential model. Early and late wood ring widths, cambium width, and scion trunk radius were correlated with 27 traits. Modeling of annual ring width shows that scions alter the width of the first rings but that rootstocks alter the decay thereafter, consistently shortening ring width throughout the lifetime of the vine. The ratio of yield to vegetative growth, juice pH, photosynthetic assimilation and transpiration rates, and stomatal conductance are correlated with scion trunk radius. Rootstocks modulate secondary growth over years, altering hydraulic conductance, physiology, and agronomic traits. Rootstocks act in similar but distinct ways from climate to modulate ring width, which borrowing techniques from dendrochronology, can be used to monitor both genetic and environmental effects in woody perennial crop species.