Find research datasets worth reusing

opencc-by-4.0Dec 2016View details →

Fig. 1 in Endemic Families of Madagascar. XIV. a New Restricted Range Species of Pentachlaena H. Perrier (Sarcolaenaceae) from Central Madagascar

Fig. 1. – Pentochloeno vestito Andriam., Lowry & G.E. Schatz. A. Flowering branch; B. Detail of indument on lower leaf surface; C. Detail of upper leaf surface; D. Flower; E. Detail of androecium; F. Detail of gynoecium; G. Fruit.

opencc-by-4.0May 2024View details →

Tropical range extending herbivorous fishes gain foraging benefits by shoaling with native temperate species

Data1.csv contains the data to analyze the abundance of fish herbivore individuals as a function of the species and the type of shoal.   Data2.xlsx contains the data to analyze the foraging activity of the herbivorous fish found in our study. We explored the relationship between bite rates per fish min-1 and the species, shoal type and shoal size.   Data3.xlslx contains the data to analyze the shoaling configurations based on species origin.  Minguito-Frutos_etal.R contains the R reproducible code to run all the analyses carried out in this study.  Species_coocurrence_based_associations.R contains the reproducible R code to run the analyses to explore the strength of mixed-species associations between herbivorous fish.  ------------------------------------------------------------------------------------------------------------------------------------------- Data1.csv, Data2.xlsx, Data3.xlslx, and Minguito-Frutos_etal.R contains the data and code used before submitting this work.  ------------------------------------------------------------------------------------------------------------------------------------------- Minguito_Frutos_etal2025_SR_Rscript, Data_Rev_SR, and Data2_Rev_SR contain the data and code derived from the last submission to Scientific Reports. In this latest version, we modified our analyses of fish foraging activity that now evaluate: (i) the frequency and size of mixed-species shoals based on the origin of the species examined (using data in Data2_Rev_SR), (ii) the strength of pair-wise associations between native and range-expanding species (using Species_coocurrence_based_associations.R), and (iii) how the foraging activity of native and range-extending fishes was shaped by the composition and size of the shoals (using data in Data_Rev_SR).

opencc-zeroNov 2023View details →

Data from: Integrated species distribution models to account for sampling biases and improve range wide occurrence predictions

Aim Species distribution models (SDMs) that integrate presence-only and presence-absence data offer a promising avenue to improve information on species' geographic distributions. The use of such 'integrated SDMs' on a species range-wide extent has been constrained by the often-limited presence-absence data and by the heterogeneous sampling of the presence-only data. Here, we evaluate integrated SDMs for studying species ranges with a novel expert range map-based evaluation. We build a new understanding about how integrated SDMs address issues of estimation accuracy and data deficiency and thereby offer advantages over traditional SDMs. Location South and Central America. Time period 1979-2017. Major taxa studied Hummingbirds. Methods We build integrated SDMs by linking two observation models – one for each data type – to the same underlying spatial process. We validate SDMs with two schemes: i) cross-validation with presence-absence data and ii) comparison with respect to the species' whole range as defined with IUCN range maps. We also compare models relative to the estimated response curves and compute the association between the benefit of the data integration and the number of presence records in each data set. Results The integrated SDM accounting for the spatially varying sampling intensity of the presence-only data was one of the top-performing models in both model validation schemes. Presence-only data alleviated overly large niche estimates, and data integration was beneficial compared to modelling solely presence-only data for species that had few presence points when predicting the species' whole range. On the community level, integrated models improved the species richness prediction. Main conclusions Integrated SDMs combining presence-only and presence-absence data are successfully able to borrow strengths from both data types and offer improved predictions of species' ranges. Integrated SDMs can potentially alleviate the impacts of taxonomically and geographically uneven sampling and to leverage the detailed sampling information in presence-absence data.

opencc-zeroJan 2024View details →

Thermal performance of Aedes sierrensis life history traits for populations collected across the species range

How mosquitoes may respond to rapid climate warming remains unknown for most species, but will have major consequences for their future distributions, with cascading impacts on human well-being, biodiversity, and ecosystem function. We investigated the adaptive potential of a wide-ranging mosquito species, Aedes sierrensis, across a large climatic gradient by conducting a common garden experiment measuring the thermal limits of mosquito life history traits. Although field-collected populations originated from vastly different thermal environments that spanned over 1,200 km, we found limited variation in upper thermal tolerance between populations. In particular, the upper thermal limits of all life history traits varied by <3°C across the species range and, for most traits, did not differ significantly between populations. For one life history trait—pupal development rate—we did detect significant variation in upper thermal limits between populations, and this variation was strongly correlated with source temperatures, providing evidence of local thermal adaptation for pupal development. However, we found that maximum environmental temperatures across most of the species' range already regularly exceed the highest upper thermal limits estimated under constant temperatures. This result suggests that strategies for coping with and/or avoiding thermal extremes are likely key components of current and future mosquito thermal tolerance.

opencc-zeroJan 2024View details →

Combining camera trap surveys and IUCN range maps to improve knowledge of species distributions

Reliable maps of species distributions are fundamental for biodiversity research and conservation. Range maps created by the International Union for Conservation of Nature (IUCN) Red List are often considered authoritative but may not match species occurrence data. We tested concordance between occurrences from camera trap surveys and predicted occurrence from IUCN maps for 510 medium- to large-bodied mammalian species in 80 camera-trap sampling areas. Across all areas, cameras detected 39% of the species that were expected to occur based on IUCN ranges. The probability of mismatches between camera traps and IUCN range maps was significantly higher for smaller-bodied mammals and habitat specialists in the Neotropics and Indomalaya, and in areas with shorter canopy forests. Our results indicate that in many areas within their range map distributions species may be rare or absent. We suggest that combining range map data with accumulating data from ground-based biodiversity sensors, such as camera traps, acoustic recorders, and eDNA surveys, provides a richer knowledge base for conservation mapping and planning.

opencc-zeroMar 2024View details →

Resources for: Spatio-temporal integrated Bayesian species distribution models reveal lack of broad relationships between traits and range shifts

Aim: Climate change and habitat loss or degradation are some of the greatest threats that species face today, often resulting in range shifts. Species traits have been discussed as important predictors of range shifts, with the identification of general trends being of great interest for conservation efforts. However, studies reviewing relationships between traits and range shifts have questioned the existence of such generalized trends, due to mixed results and weak correlations, as well as analytical shortcomings. The aim of this study was to test this relationship empirically, using analytical approaches that account for common sources of bias when assessing range trends. Location: Tanzania, East Africa. Time period: 1980-1999 and 2000-2020. Major taxa studied: 57 savannah specialist birds found in Tanzania, belonging to 26 families and 11 orders. Methods: We applied recently developed integrated spatio-temporal species distribution models in R-INLA, combining citizen science and bird atlas data to estimate ranges of species, quantify range shifts, and test the predictive power of traditional trait groups, as well as exposure-related and sensitivity traits. We based our study on 40 years of bird observations in East African savannahs, a biome that has experienced increasing climatic and non-climatic pressures over recent decades. We correlated patterns of change with species traits. Results: We find indications of relationships identified by previous research, but low average explanatory power of traits from an ecological perspective, confirming the lack of meaningful general associations. However, our analysis finds compelling species-specific results. Main conclusions: We highlight the importance of individual assessments, while demonstrating the usefulness of our analytical approach for analyses of range shifts.

Fig. 3 in Distributional Range Extension of the Shallow Water Scorpionfish Parascorpaena poseidon (Perciformes: Scorpaenidae), with a Revised Diagnosis of the Species

Fig. 3. Lateral (A) and dorsal (B) views of head of Parascorpaena poseidon (NSMT-P 17865, 97.8 mm SL). Bars indicate 5 mm.

Fig. 4 in Distributional Range Extension of the Shallow Water Scorpionfish Parascorpaena poseidon (Perciformes: Scorpaenidae), with a Revised Diagnosis of the Species

Fig. 4. Relationships between body width (A); head width (B); snout length (C); interorbital width at vertical midline of eye (D); upper-jaw length (E); maxilla depth (F); postorbital length (G); orbit diameter (H); and separation between opercular spine tips (I) (all as % of SL) and standard length (mm) in Parascorpaena poseidon, showing ontogenetic changes. Star indicates holotype [except for snout length, interorbital width at vertical midline of eye, and upper-jaw length—see text regarding measurements by Chou and Liao (2022)].

Fig. 2 in Distributional Range Extension of the Shallow Water Scorpionfish Parascorpaena poseidon (Perciformes: Scorpaenidae), with a Revised Diagnosis of the Species

Fig. 2. Variously-sized preserved specimens of Parascorpaena poseidon. A, FMNH 75818, 1 of 27 specimens, 35.3 mm SL, Galle, Sri Lanka; B, FMNH 75818, 1 of 27 specimens, 65.3 mm SL, Galle, Sri Lanka; C, NSMT-P 17865, 97.8 mm SL, Yaku-shima Island, Osumi Islands, Kagoshima, Japan; D, BPBM 27680, 1 of 2 specimens, 115.4 mm SL, Kovalam, Kerala India.

Fig. 1 in Distributional Range Extension of the Shallow Water Scorpionfish Parascorpaena poseidon (Perciformes: Scorpaenidae), with a Revised Diagnosis of the Species

Fig. 1. Fresh specimen of Parascorpaena poseidon from Kovalam, Kerala, India (BPBM 27680, 1 of 2 specimens, 115.4 mm SL). Photo by J. E. Randall (BPBM).

Fig. 5 in Distributional Range Extension of the Shallow Water Scorpionfish Parascorpaena poseidon (Perciformes: Scorpaenidae), with a Revised Diagnosis of the Species

Fig. 5. Distributional records of Parascorpaena poseidon, based on original description (triangles and star), literature record as P. mossambica (closed circle), and present study (open circles). Star indicates type locality.

opencc-zeroDec 2000View details →

FIG. 4 in New extension range of the diaptomid copepod Prionodiaptomus colombiensis Thiébaud, 1912 (Copepoda, Calanoida) with complementary description of this species

FIG. 4. — Prionodiaptomus colombiensis Thiébaud, 1912, adult male; A, habitus dorsal view; B, fifth legs, posterior view, showing coxal spines; C, fifth leg second right exopod, showing aculeus; D, right fifth leg, showing endopod; E, antennule. Scale bars: A, 100 µm; B, 13.3 µm; C, 20 µm; D, 6.6 µm; E, 7 µm.

opencc-zeroDec 2000View details →

FIG. 1 in New extension range of the diaptomid copepod Prionodiaptomus colombiensis Thiébaud, 1912 (Copepoda, Calanoida) with complementary description of this species

FIG. 1. — Prionodiaptomus colombiensis Thiébaud, 1912; A, habitus dorsal, female; B, antennule, female; C, habitus dorsal, male; D, right antennule, male; E, right antennule, segments 8-13 (only spines are illustrated), male. Scale bars: A, C, 0.5 mm; B, D, 0.17 mm; E, 0.12 mm.

Fig. 4 in Endemic Families of Madagascar. XIII. New, restricted range species of Eremolaena Baill. and Schizolaena Thouars (Sarcolaenaceae)

Fig. 4. – Schizolaena charlotteae Lowry & G. E. Schatz. A. Branch with fruiting involucre; B. Flower (from above); C. Involucre surrounding mature fruit; D. Detail of leaf; [A-B, D: Antilahimena 4786; C: RandriataFika & al. 653] [Drawing: R. L. Andriamiarisoa]

Fig. 3 in Endemic Families of Madagascar. XIII. New, restricted range species of Eremolaena Baill. and Schizolaena Thouars (Sarcolaenaceae)

Fig. 3. – Geographic distribution of Eremolaena darainensis Nusb. & Lowry (stars), Schizolaena charlotteae Lowry & G. E. Schatz (circles) and Schizolaena parvipetala Randrian. & Hong-Wa (squares), mapped on the bioclimatic zones of Madagascar (after CORNET, 1974; see SCHATZ, 2000).

Fig. 2 in Endemic Families of Madagascar. XIII. New, restricted range species of Eremolaena Baill. and Schizolaena Thouars (Sarcolaenaceae)

Fig. 2. – Photographs of Eremolaena darainensis Nusb. & Lowry (A-D) and Schizolaena charlotteae Lowry & G. E. Schatz (E). A. Flower, from above (petals fallen); B. Detail of midvein on abaxial leaf surface showing long white stellate trichomes near the margin and small stellate-strigose indument on nerves; C. Flower, from side (2 petals remaining); D. Detail of abaxial surface of a sepal, with stellate-strigose indument on the overlapping part less dense on the left side than on the right side; E. Flower and buds with young involucres. [A-D: Nusbaumer & Ranirison LN 1420; E. RandriataFika & al. 653] [Photos: A-D: L. Nusbaumer; E: P. Lowry].

Fig. 1 in Endemic Families of Madagascar. XIII. New, restricted range species of Eremolaena Baill. and Schizolaena Thouars (Sarcolaenaceae)

Fig. 1. – Eremolaena darainensis Nusb. & Lowry. A. Branch with buds and nearly open flowers; B. Detail of adaxial surface of leaf; C. Bud with pedicel; D. Branch with buds; E. Detail of abaxial surface of leaf; F. Detail of adaxial surface of leaf. [A-C: Ranirison & Nusbaumer PR 936; D-F: Nusbaumer & Ranirison LN 1420] [Drawing: R. L. Andriamiarisoa]

opencc-zeroMar 2022View details →

Data and R codes: species range-size variation in oaks

We used occurrence data of 183 oak species (Quercus spp.) in North and South America to test how niche breadth and niche position affect the amount of suitable habitat area, and how colonization ability and post-glacial migration lags affect range filling. This dataset includes the data and R files related to the analyses.

opencc-by-4.0Oct 2017View details →

Fig. 1 in Interspecific Interactions as a Factor of Limitation of Geographical Distribution: Evidence Obtained by Modeling Home Ranges of Vole Twin Species Microtus Arvalis – M. Levis (Rodentia, Microtidae)

Fig. 1. Potential distribution of the Common vole Microtus arvalis. White circles are georeferenced occurrences of genetically identified individuals; black indicates areas of maximum habitat suitability, white are areas of lowest suitability.