Search Results - "Duckworth, Gregory"

Is climate change causing the range contraction of Cape Rock‐jumpers (Chaetops frenatus)? by Duckworth, Gregory D., Garcia, Raquel A., Scholtz, Rheinhardt, Altwegg, Res

“…Species distribution models often suggest strong links between climate and species' distribution boundaries and project large distribution shifts in response…”
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Effectiveness of protected areas for bird conservation depends on guild by Duckworth, Gregory D., Altwegg, Res

“…Aim: Protected areas are key conservation tools intended to increase biodiversity and reduce extinction risks of species and populations. However, the degree…”
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Diversity of pollen sources used by managed honey bees in variegated landscapes by Melin, Annalie, Colville, Jonathan F, Duckworth, Gregory D, Altwegg, Res, Slabbert, Ruhan, Midgley, Jeremy J, Rouget, Mathieu, S Donaldson, John

“…Honey bees are the most economically important crop pollinator worldwide. They depend on a diversity of pollen for reproduction and colony growth. However, the…”
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Why a landscape view is important: nearby urban and agricultural land affects bird abundances in protected areas by Duckworth, Gregory Duncan, Altwegg, Res

“…Protected areas are one of the primary conservation tools used worldwide. However, they are often embedded in a landscape that is intensely used by people,…”
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Soil moisture limits foraging: a possible mechanism for the range dynamics of the hadeda ibis in southern Africa by Duckworth, Gregory D, Altwegg, Res, Guo, Danni

“…Climate limits the ranges of many animals, but the mechanism whereby it does so remains poorly understood. One explanation is that climate (e.g. temperature or…”
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Different drivers create spatial vegetation cover and vertical structure in semi-arid African savannas by Scholtz, Rheinhardt, Kiker, Gregory A, Duckworth, Gregory D, Scharler, Ursula M, Mwambi, Henry G, Venter, Frederick J

“…Important drivers of woody cover in African savannas are rainfall, soil and nutrients, and disturbance factors, such as fire and herbivory. However, very…”
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Ira Dyer and MIT Arctic acoustics research by Duckworth, Gregory L.

“…Ira Dyer and his colleague Art Baggeroer began MIT’s Arctic Acoustics research efforts in the latter half of the 1970s. In this pre-GPS and newly digital era,…”
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BIODIVERSITY RESEARCH: Soil moisture limits foraging: a possible mechanism for the range dynamics of the hadeda ibis in southern Africa by Duckworth, Gregory D., Altwegg, Res, Guo, Danni

“…Aim  Climate limits the ranges of many animals, but the mechanism whereby it does so remains poorly understood. One explanation is that climate (e.g…”
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Tracking a human walker with a fiber optic distributed acoustic sensor by Ku, Emery M., Duckworth, Gregory L.

“…Traditional ground sensors can be used as security systems to detect third party intrusion, but are costly and cumbersome to scale up to cover a large area…”
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The relevance of spatial variation in ecotourism attributes for the economic sustainability of protected areas by De Vos, Alta, Cumming, Graeme S., Moore, Christine A., Maciejewski, Kristine, Duckworth, Gregory, Peters, D. P. C.

“…In contemporary society, protected areas are increasingly expected to justify their existence through the services that they provide to society. Protected…”
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Demography and population ecology of the Hadeda Ibis (Bostrychia hagedash) at its expanding range edge in South Africa by Duckworth, Gregory Duncan, Altwegg, Res, Harebottle, Douglas Michael

“…A mechanistic understanding of species’ geographic range dynamics requires an understanding of the dynamics of populations at the edge of that range. Several…”
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OptaSense: Fibre Optic Distributed Acoustic Sensing for Border Monitoring by Owen, A., Duckworth, G., Worsley, J.

“…The OptaSense ® Distributed Acoustic Sensing (DAS) system is an acoustic and seismic sensing capability that uses simple fibre optic communications cables as…”
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OptaSense® Distributed Acoustic and Seismic Sensing Performance for Multi-threat, Multi-environment Border Monitoring by Duckworth, Gregory, Owen, Archibald, Worsley, Jerry, Stephenson, Henry

“…The OptaSense® Distributed Acoustic Sensing (DAS) technology turns any cable with single-mode optical fiber into a very large and densely sampled…”
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Mid-frequency endcap reflection and radiation coefficient extraction from FEM data by Smith, P. W., LePage, Kevin D., McDaniel, J. Gregory, Duckworth, Gregory L., Barile, Robert J.

“…The response of a simple cylindrical shell terminated by rigid endcaps to various axisymmetric mechanical excitations is determined using the SARA 2-D finite…”
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Seismic/acoustic propagation in the Arctic Ocean by Baggeroer, Arthur H., Duckworth, Gregory L.

“…During the FRAM II and FRAM IV experiments in the Pole Abyssal Plain and the Barents Abyssal Plain of the Arctic Ocean 24 channel hydrophone arrays…”
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Bottom interaction measurements at FRAM II in the Pole Abyssal Plain of the Eastern Arctic Ocean by Baggeroer, Arthur B., Duckworth, Gregory L.

“…During the FRAM II experiment in the Pole Abyssal Plain of the Eastern Arctic Ocean, an extensive program of refraction shooting was conducted. Multichannel…”
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Minimum cross entropy seismic diffraction tomography by LO, T.-W, DUCKWORTH, G. L, TOKSOÊZ, M. N

“…One difficulty in applying seismic tomography is that seismic sources and detectors cannot be deployed so that the imaging area is probed from all directions…”
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Acoustic array sensor tracking system by von der Heydt, K., Duckworth, G., Baggeroer, A.

“…Multichannel acoustic and geophysical experiments have been conducted recently in the Marginal Ice Zone (MIZ) of the eastern Arctic Fram Straits region using a…”
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Book review by Fairhurst, Charles, Dmowska, Renata, Duckworth, Gregory L., Mitchell, Brian J., Wiltschko, David V., Sammis, Charles G.

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