Omnidirectional connectivity for the Andean bear (Tremarctos ornatus) across the Colombian Andes

Mapping Intimacies ◽

10.21203/rs.3.rs-378707/v1 ◽

2021 ◽

Author(s):

Rhianna Rachelle Hohbein ◽

Nathan P. Nibbelink

Keyword(s):

Social Media ◽

Ecological Integrity ◽

Spatial Models ◽

Agricultural Landscapes ◽

Habitat Associations ◽

Ecological Data ◽

Resistance Surface ◽

Location Data ◽

Movement Data ◽

Colombian Andes

Abstract Context Conserving or restoring connectivity is a common objective of landscape-scale conservation initiatives. However, precise species occurrence or movement data to inform or validate spatial models are often lacking. Objectives Our objectives were to 1) produce the first approximation of country-wide connectivity for Andean bears ( Tremarctos ornatus ) in Colombia and 2) demonstrate a novel approach for model validation which uses publicly available web and social media records of a flagship species. Methods We used general knowledge about Andean bear habitat associations and indices of ecological integrity to construct a resistance surface across the Colombian Andes. We used this resistance surface to model omnidirectional connectivity using circuit theory. We validated our model with coarse location data acquired from local news stories and social media posts. Results Our model was most sensitive to changes in the resistance values of agricultural landcover and the mid-elevational zone, but uncertainty analysis demonstrated these had little impact on our conclusions regarding the municipalities most conducive to Andean bear movement. Just over one-third of those areas most conducive to Andean bear movement were within protected areas, while 8% coincided with agricultural landcover. Conclusions We constructed a model of connectivity that did not rely on independent, empirically derived location data. Our model is coarse (1 km resolution) but can still provide useful information to practitioners in Colombia who are working with scarce ecological data. More information about how Andean bears move through agricultural landscapes would help improve our understanding of connectivity for this species in Colombia.

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Distinguishing technology from biology: a critical review of the use of GPS telemetry data in ecology

Philosophical Transactions of the Royal Society B Biological Sciences ◽

10.1098/rstb.2010.0087 ◽

2010 ◽

Vol 365 (1550) ◽

pp. 2303-2312 ◽

Cited By ~ 316

Author(s):

Mark Hebblewhite ◽

Daniel T. Haydon

Keyword(s):

Animal Ecology ◽

Animal Movement ◽

Gps Telemetry ◽

Long Distance ◽

Location Data ◽

The Past ◽

Movement Data ◽

Migratory Songbirds ◽

Spatio Temporal ◽

Gps Devices

In the past decade, ecologists have witnessed vast improvements in our ability to collect animal movement data through animal-borne technology, such as through GPS or ARGOS systems. However, more data does not necessarily yield greater knowledge in understanding animal ecology and conservation. In this paper, we provide a review of the major benefits, problems and potential misuses of GPS/Argos technology to animal ecology and conservation. Benefits are obvious, and include the ability to collect fine-scale spatio-temporal location data on many previously impossible to study animals, such as ocean-going fish, migratory songbirds and long-distance migratory mammals. These benefits come with significant problems, however, imposed by frequent collar failures and high cost, which often results in weaker study design, reduced sample sizes and poorer statistical inference. In addition, we see the divorcing of biologists from a field-based understanding of animal ecology to be a growing problem. Despite these difficulties, GPS devices have provided significant benefits, particularly in the conservation and ecology of wide-ranging species. We conclude by offering suggestions for ecologists on which kinds of ecological questions would currently benefit the most from GPS/Argos technology, and where the technology has been potentially misused. Significant conceptual challenges remain, however, including the links between movement and behaviour, and movement and population dynamics.

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Keyword Expansion Techniques for Mining Social Movement Data on Social Media

SSRN Electronic Journal ◽

10.2139/ssrn.3878554 ◽

2021 ◽

Author(s):

Lia Bozarth ◽

Ceren Budak

Keyword(s):

Social Media ◽

Social Movement ◽

Movement Data

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Continent-wide tracking to determine migratory connectivity and tropical habitat associations of a declining aerial insectivore

Proceedings of The Royal Society B Biological Sciences ◽

10.1098/rspb.2012.2207 ◽

2012 ◽

Vol 279 (1749) ◽

pp. 4901-4906 ◽

Cited By ~ 78

Author(s):

Kevin C. Fraser ◽

Bridget J. M. Stutchbury ◽

Cassandra Silverio ◽

Patrick M. Kramer ◽

John Barrow ◽

...

Keyword(s):

North American ◽

Agricultural Landscape ◽

Ground Cover ◽

Light Level ◽

Agricultural Landscapes ◽

Habitat Associations ◽

Migratory Connectivity ◽

Population Declines ◽

Long Distance ◽

Breeding Populations

North American birds that feed on flying insects are experiencing steep population declines, particularly long-distance migratory populations in the northern breeding range. We determine, for the first time, the level of migratory connectivity across the range of a songbird using direct tracking of individuals, and test whether declining northern populations have higher exposure to agricultural landscapes at their non-breeding grounds in South America. We used light-level geolocators to track purple martins, Progne subis , originating from North American breeding populations, coast-to-coast ( n = 95 individuals). We show that breeding populations of the eastern subspecies, P. s. subis , that are separated by ca . 2000 km, nevertheless have almost completely overlapping non-breeding ranges in Brazil. Most (76%) P. s. subis overwintered in northern Brazil near the Amazon River, not in the agricultural landscape of southern Brazil. Individual non-breeding sites had an average of 91 per cent forest and only 4 per cent agricultural ground cover within a 50 km radius, and birds originating from declining northern breeding populations were not more exposed to agricultural landscapes than stable southern breeding populations. Our results show that differences in wintering location and habitat do not explain recent trends in breeding population declines in this species, and instead northern populations may be constrained in their ability to respond to climate change.

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Social Media account linkage using user-generated geo-location data

2016 IEEE Conference on Intelligence and Security Informatics (ISI) ◽

10.1109/isi.2016.7745460 ◽

2016 ◽

Cited By ~ 4

Author(s):

Xiaohui Han ◽

Lianhai Wang ◽

Lijuan Xu ◽

Shuihui Zhang

Keyword(s):

Social Media ◽

Location Data

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Solving Competitive Location Problems with Social Media Data Based on Customers’ Local Sensitivities

ISPRS International Journal of Geo-Information ◽

10.3390/ijgi8050202 ◽

2019 ◽

Vol 8 (5) ◽

pp. 202 ◽

Cited By ~ 2

Author(s):

Wei Jiang ◽

Yandong Wang ◽

Mingxuan Dou ◽

Senbao Liu ◽

Shiwei Shao ◽

...

Keyword(s):

Social Media ◽

Cost Effective ◽

Optimal Location ◽

Location Based Services ◽

Location Problems ◽

Competitive Location ◽

Test Cases ◽

Social Media Data ◽

Location Data ◽

Media Data

Competitive location problems (CLPs) are a crucial business concern. Evaluating customers’ sensitivities to different facility attractions (such as distance and business area) is the premise for solving a CLP. Currently, the development of location-based services facilitates the use of location data for sensitivity evaluations. Most studies based on location data assumed the customers’ sensitivities to be global and constant over space. In this paper, we proposed a new method of using social media data to solve competitive location problems based on the evaluation of customers’ local sensitivities. Regular units were first designed to spatially aggregate social media data to extract samples with uniform spatial distribution. Then, geographically weighted regression (GWR) and the Huff model were combined to evaluate local sensitivities. By applying the evaluation results, the captures for different feasible locations were calculated, and the optimal location for a new retail facility could be determined. In our study, the five largest retail agglomerations in Beijing were taken as test cases, and a possible new retail agglomeration was located. The results of our study can help people have a better understanding of the spatial variation of customers’ local sensitivities. In addition, our results indicate that our method can solve competitive location problems in a cost-effective way.

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Movements of Adult Female Dungeness Crabs (Cancer magister) In Northern California Based on Tag Recoveries

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f85-116 ◽

1985 ◽

Vol 42 (5) ◽

pp. 919-926 ◽

Cited By ~ 16

Author(s):

Nancy Diamond ◽

David G. Hankin

Keyword(s):

Adult Female ◽

Fishing Effort ◽

Nonparametric Tests ◽

Northern California ◽

Cancer Magister ◽

Directed Movement ◽

Location Data ◽

Movement Data ◽

Large Numbers ◽

Dungeness Crabs

Of 11072 adult female Dungeness crabs (Cancer magister) tagged and released in northern California, 463 were recovered with useful location data that could be used for analyses of crab movement patterns. Although qualitative analyses of movement data suggested possible directed northward movement during winter months, application of two nonparametric tests of movement directionality (the Rayleigh test and Moore's test) failed to support significant directed movement during winter. Large numbers of tagged crabs were recovered inshore of release in shallow sandy areas during spring months, but valid statistical analyses of spring movement data were ruled out by concentration of fishing effort in shallow waters during spring. Nevertheless, recovery of large numbers of tagged females in inshore areas during spring is entirely consistent with an hypothesis of spring inshore movement of females for molting, mating, and later extrusion of egg masses. This hypothesis can be constructed on the basis of information independent of tag recovery data. The most striking finding was that 46% of all recovered crabs were recaptured within 2 km of original release sites; many of these crabs had been at large more than 1 yr. Adult female Dungeness crabs appear to constitute extremely localized stocks in northern California.

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Do you believe your (social media) data A personal story on location data biases, errors, and plausibility as well as their visualization

IEEE Transactions on Visualization and Computer Graphics ◽

10.1109/tvcg.2022.3141605 ◽

2022 ◽

pp. 1-1

Author(s):

Tobias Isenberg ◽

Zujany Salazar ◽

Rafael Blanco ◽

Catherine Plaisant

Keyword(s):

Social Media ◽

Social Media Data ◽

Personal Story ◽

Location Data ◽

Media Data

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Genomic and healthcare dynamics of nosocomial SARS-CoV-2 transmission

eLife ◽

10.7554/elife.65453 ◽

2021 ◽

Vol 10 ◽

Author(s):

Jamie M Ellingford ◽

Ryan George ◽

John H McDermott ◽

Shazaad Ahmad ◽

Jonathan J Edgerley ◽

...

Keyword(s):

Infection Control ◽

Temporal Dynamics ◽

Management Strategies ◽

Healthcare Setting ◽

Location Data ◽

Genome Data ◽

Healthcare Settings ◽

Movement Data ◽

Spatial And Temporal Dynamics ◽

Transmission Pathways

Understanding the effectiveness of infection control methods in reducing and preventing SARS-CoV-2 transmission in healthcare settings is of high importance. We sequenced SARS-CoV-2 genomes for patients and healthcare workers (HCWs) across multiple geographically distinct UK hospitals, obtaining 173 high-quality SARS-CoV-2 genomes. We integrated patient movement and staff location data into the analysis of viral genome data to understand spatial and temporal dynamics of SARS-CoV-2 transmission. We identified eight patient contact clusters (PCC) with significantly increased similarity in genomic variants compared to non-clustered samples. Incorporation of HCW location further increased the number of individuals within PCCs and identified additional links in SARS-CoV-2 transmission pathways. Patients within PCCs carried viruses more genetically identical to HCWs in the same ward location. SARS-CoV-2 genome sequencing integrated with patient and HCW movement data increases identification of outbreak clusters. This dynamic approach can support infection control management strategies within the healthcare setting.

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