Filters








73,426 Hits in 3.6 sec

Exploring the Landscape of Spatial Robustness [article]

Logan Engstrom, Brandon Tran, Dimitris Tsipras, Ludwig Schmidt, Aleksander Madry
2019 arXiv   pre-print
The study of adversarial robustness has so far largely focused on perturbations bound in p-norms.  ...  This highlights spatial robustness as a fundamentally different setting requiring additional study.  ...  Acknowledgements Dimitris Tsipras was supported in part by the NSF grant CCF-1553428 and the NSF Frontier grant CNS-1413920. Aleksander Mądry was supported in part by an Alfred P.  ... 
arXiv:1712.02779v4 fatcat:2eing5ri2nhtddfy2pmlkcbnly

Editorial: The Least Cost Path From Landscape Genetics to Landscape Genomics: Challenges and Opportunities to Explore NGS Data in a Spatially Explicit Context

Samuel A. Cushman, Andrew J. Shirk, Glenn T. Howe, Melanie A. Murphy, Rodney J. Dyer, Stéphane Joost
2018 Frontiers in Genetics  
The purpose of this Research Topic for Evolutionary and Population Genetics is to explore a number of critical challenges and opportunities for the transition from landscape genetics to landscape genomics  ...  This limits the spatial and temporal sample sizes for economic reasons, making it challenging to achieve spatial representativeness and temporal robustness.  ...  The Editorial on the Research Topic The Least Cost Path From Landscape Genetics to Landscape Genomics: Challenges and Opportunities to Explore NGS Data in a Spatially Explicit Context Ecosystems are  ... 
doi:10.3389/fgene.2018.00215 pmid:29971091 pmcid:PMC6018102 fatcat:jyuas4z3njaidjnun2b5a56luu

Exploring Non-Linear Relationships between Landscape and Aquatic Ecological Condition in Southern Wisconsin

Richard R. Shaker, Timothy J. Ehlinger
2014 International Journal of Applied Geospatial Research  
Recent studies have implied the importance of incorporating configuration metrics into landscape-aquatic ecological integrity research; however few have addressed the needs of spatial data while exploring  ...  This study investigates spatial dependence of a measure of aquatic ecological condition at two basin scales, and the spatial and non-linear role of landscape in explaining that measure across 92 watersheds  ...  Both forms of spatial structure are problematic in statistical analysis, as spatial autocorrelation in the residuals violates the assumption of independent Copyright © 2014, IGI Global.  ... 
doi:10.4018/ijagr.2014100101 fatcat:ejsmqzhrz5fbti3hbnnutt7pbq

MANAGING LANDSCAPES FOR CONSERVATION UNDER UNCERTAINTY

M. A. Burgman, D. B. Lindenmayer, J. Elith
2005 Ecology  
In ecology, populations may be linked conceptually with landscapes through habitat and spatial population models.  ...  Landscape pattern analysis was the first attempt to deal with multiple species, and it led to a range of landscape management strategies.  ...  Landscape ecology focuses on the link between the spatial pattern of a landscape and the dynamics of the species it supports. There are many ways to explore and characterize this link.  ... 
doi:10.1890/04-0906 fatcat:uoadp3pi6zbsnlotsfyj6wgnc4

Energy-scales convergence for optimal and robust quantum transport in photosynthetic complexes

M. Mohseni, A. Shabani, S. Lloyd, H. Rabitz
2014 Journal of Chemical Physics  
Notably, the degree of robustness of these systems for transporting energy is not known considering their realistic interactions with vibrational and radiative environments within the surrounding solvent  ...  We observe that the dynamics of the Fenna-Matthews-Olson (FMO) complex leads to optimal and robust energy transport due to a convergence of energy scales among all important internal and external parameters  ...  The difficulty is that for studying the optimality or robustness of these complexes one has to fully explore both topology and geometry of energy transfer efficiency landscape outside of the known values  ... 
doi:10.1063/1.4856795 pmid:25669414 fatcat:ggzjomiburcqxk6sfynir3ms7y

Robust, multifunctional flood defenses in the Dutch rural riverine area

J. M. van Loon-Steensma, P. Vellinga
2014 Natural Hazards and Earth System Sciences  
</strong> This paper reviews the possible functions as well as strengths, weaknesses, opportunities, and threats for robust flood defenses in the rural riverine areas of the Netherlands on the basis of  ...  At each of the five locations, suitable robust flood defenses could be identified that would contribute to the envisaged functions and ambitions for the respective areas.  ...  This work was supported by the Knowledge for Climate Program (Theme 1) and the Strategic Knowledge Program of the Dutch Ministry of Economic Affairs, Agriculture and Innovation (Theme 14).  ... 
doi:10.5194/nhess-14-1085-2014 fatcat:26nlaxlk35htxnegtwz432an4e

Robustness of metacommunities with omnivory to habitat destruction: disentangling patch fragmentation from patch loss

Jinbao Liao, Daniel Bearup, Yeqiao Wang, Ivan Nijs, Dries Bonte, Yuanheng Li, Ulrich Brose, Shaopeng Wang, Bernd Blasius
2017 Ecology  
Numerous studies have explored the effect of patch loss on food web dynamics, but ignored the critical role of patch fragmentation.  ...  The resulting trophic structure varies depending on the degree of habitat loss and fragmentation, due to a tradeoff between bottom-up control on omnivores (dominated by patch loss) and dispersal limitation  ...  ACKNOWLEDGMENTS This study was supported by the DFG through grant FOR 1748, the Ministry of Science and Culture of Lower Saxony in the project "Biodiversity-Ecosystem Functioning across marine and terrestrial  ... 
doi:10.1002/ecy.1830 pmid:28369715 fatcat:4r7jq6wajnhspgpyv2ah6wmjvy

Page 1194 of The Journal of Animal Ecology Vol. 73, Issue 6 [page]

2004 The Journal of Animal Ecology  
. & Gardner, R.H. (1996) The effect of landscape heterogeneity on the probability of patch colonization. Ecology, 77, 94-107. Jander, R. (1975) Ecological aspects of spatial orientation.  ...  We emphasize further that this exploration requires the increased integration of behavioural and ecological knowledge, as well as combination of ethological and landscape approaches.  ... 

Effects of changing scale on landscape pattern analysis: scaling relations

Jianguo Wu
2004 Landscape Ecology  
The major objective of this study was to explore if there are any scaling relations for landscape pattern when it is measured over a range of scales ͑grain size and extent͒.  ...  Considering that the landscapes under study were quite diverse in terms of both composition and configuration, these results seem robust.  ...  This research was supported in part by grants from the United States Department of Agriculture ͑USDA-NRICGP 95-37101-2028͒, the U.S.  ... 
doi:10.1023/b:land.0000021711.40074.ae fatcat:y37haxyfova6flzxih3jgxsa5a

Non-spatial calibrations of a general unit model for ecosystem simulations

Roelof M Boumans, F Villa, R Costanza, A Voinov, H Voinov, T Maxwell
2001 Ecological Modelling  
The Patuxent Landscape Model is built under the Spatial Modeling Environment.  ...  We present the development and testing of a unit model for the Patuxent River landscape in the state of Maryland, USA.  ...  Model description Pat -GEM was developed to be the ecological model and non-spatial building unit for the spatial Patuxent Landscape Model (PLM).  ... 
doi:10.1016/s0304-3800(01)00293-9 fatcat:rdsly7hafncjnky5axbgezu5uy

QUANTIFYING EFFECTS OF CHANGING SPATIAL SCALE ON SPATIAL ENTROPY INDEX: USE OF FRACTAL DIMENSION

C. J. Wang, H. R. Zhao, D. M. Huang
2019 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences  
The result indicates that Spatial Entropy index shows a robust fractal feature, and it decreases as the spatial scale (or grain size) becomes lager in a moderate degree.  ...  However, the effects of changing spatial scale on Hs has not been quantified. This paper applies the fractal method to measure the spatial scale (grain size) sensitivity of Hs.  ...  A COD value close to 1 means a robust fractal feature of the metrics, this is to say, this landscape metric exhibits a power law that is highly consist and robust over a range of scales (Wu, 2004) .  ... 
doi:10.5194/isprs-archives-xlii-4-w20-83-2019 fatcat:5sqotg6kcrcnncmyrgflxvyjre

Ecosystem Services and Urbanisation. A Spatially Explicit Assessment in Upper Silesia, Central Europe

Luis Inostroza, Francisco de la Barrera
2019 IOP Conference Series: Materials Science and Engineering  
In this contribution, a spatial analysis was carried out in Upper Silesia, central Europe, to explore the provision of ES and the levels of urbanisation to advance the use of ES in planning.  ...  To date, the evidence of the spatial variability of the relationship between ES and urbanisation is scarce.  ...  Acknowledgements This research was supported by the CONICYT/FONDECYT research grant N11160643.  ... 
doi:10.1088/1757-899x/471/9/092028 fatcat:jc4ufd3m2jfapfnh76n45ljnmu

Towards adaptive tourism areas: using fitness landscapes for managing and futureproofing tourism area development

Stefan Hartman
2018 Journal of Tourism Futures  
The purpose of this paper is to contribute to an enhanced understanding and conceptualization of adaptive tourism areas by drawing attention to "fitness landscapes," a metaphor that is used in complexity  ...  Findings -The article raises awareness about and draws attention to a set of factors and conditions that support tourism planners and managers in enhancing the capacity of tourism areas to adaptively respond  ...  The fact that multiple perspectives co-exist could raise issues in the context of exploring the space of possibilities/mapping fitness landscapes.  ... 
doi:10.1108/jtf-03-2018-0009 fatcat:yjmx36lls5gdbcevw3cemr6sja

Design in science: extending the landscape ecology paradigm

Joan Iverson Nassauer, Paul Opdam
2008 Landscape Ecology  
We conclude that landscape design created collaboratively by scientists and practitioners in many disciplines improves the impact of landscape science in society and enhances the saliency and legitimacy  ...  of landscape ecological scientific knowledge.  ...  Another project explored how the flexibility of the design guidelines could be increased by combining varying matrix characteristics of the wider landscape with the varied dimensions of the robust corridors  ... 
doi:10.1007/s10980-008-9226-7 fatcat:njzwsxiwjngenagj2hk4tope4i

Habitat loss and the disassembly of mutalistic networks

Miguel A. Fortuna, Abhay Krishna, Jordi Bascompte
2012 Oikos  
Here we develop a spatially explicit metacommunity model based on the structure of 30 real mutualistic networks.  ...  Second, there is a homogeneous distribution of the number of interactions per patch when the habitat is pristine, while this becomes very skewed at the brink of extinction.  ...  Acknowledgements -We thank Daniel Stouffer and Jelle Lever for discussions and the Centro de Supercomputación de Galicia (CESGA) for computing facilities.  ... 
doi:10.1111/j.1600-0706.2012.00042.x fatcat:vysper3lwvcklkdmxth43hx7k4
« Previous Showing results 1 — 15 out of 73,426 results