scholarly journals Parched pines: a quantitative comparison of two multi‐year droughts and associated mass mortalities of bishop pine ( Pinus muricata ) on Santa Cruz Island, California

2019 ◽  
Vol 6 (1) ◽  
pp. 20-34 ◽  
Author(s):  
Annalise Taylor ◽  
Tanushree Biswas ◽  
John M. Randall ◽  
Kirk Klausmeyer ◽  
Brian Cohen
Keyword(s):  
Quantitative Comparison ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Pinus Muricata ◽  
Mass Mortalities ◽  
Associated Mass

THE MARINE TERRACES OF SANTA CRUZ ISLAND, CALIFORNIA: IMPLICATIONS FOR GLACIAL ISOSTATIC ADJUSTMENT MODELS OF LAST-INTERGLACIAL SEA-LEVEL HISTORY

2020 ◽  
Author(s):  
Daniel Muhs ◽  
◽  
R.R. Schumann ◽  
Lindsey T. Groves ◽  
Kathleen R. Simmons ◽  
...  
Keyword(s):  
Sea Level ◽  
Glacial Isostatic Adjustment ◽  
Last Interglacial ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Isostatic Adjustment ◽  
Marine Terraces

scholarly journals Body size, sex and high philopatry influence the use of agricultural land by Galapagos giant tortoises

Oryx ◽  
2021 ◽  
pp. 1-10
Author(s):  
Kyana N. Pike ◽  
Stephen Blake ◽  
Freddy Cabrera ◽  
Iain J. Gordon ◽  
Lin Schwarzkopf
Keyword(s):  
National Park ◽  
Agricultural Land ◽  
Large Male ◽  
Gps Data ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Agricultural Areas ◽  
On Farm ◽  
Human Wildlife Conflict ◽  
Privately Owned

Abstract As agricultural areas expand, interactions between wild animals and farmland are increasing. Understanding the nature of such interactions is vital to inform the management of human–wildlife coexistence. We investigated patterns of space use of two Critically Endangered Galapagos tortoise species, Chelonoidis porteri and Chelonoidis donfaustoi, on privately owned and agricultural land (hereafter farms) on Santa Cruz Island, where a human–wildlife conflict is emerging. We used GPS data from 45 tortoises tracked for up to 9 years, and data on farm characteristics, to identify factors that influence tortoise movement and habitat use in the agricultural zone. Sixty-nine per cent of tagged tortoises used the agricultural zone, where they remained for a mean of 150 days before returning to the national park. Large male tortoises were more likely to use farms for longer periods than female and smaller individuals. Tortoises were philopatric (mean overlap of farmland visits = 88.7 ± SE 2.9%), on average visiting four farms and occupying a mean seasonal range of 2.9 ± SE 0.3 ha. We discuss the characteristics of farm use by tortoises, and its implications for tortoise conservation and coexistence with people.

scholarly journals Isotopic Niche Segregation among Darwin’s Finches on Santa Cruz Island, Galápagos

Diversity ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 147
Author(s):  
Mariana Villegas ◽  
Catherine Soos ◽  
Gustavo Jiménez-Uzcátegui ◽  
Shukri Matan ◽  
Keith A. Hobson
Keyword(s):  
Three Dimensional ◽  
Sympatric Species ◽  
Isotopic Niche ◽  
Museum Specimens ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Δ13c And Δ15n ◽  
Darwin's Finches ◽  
Darwin’S Finches ◽  
Foraging Guilds

Darwin’s finches are a classic example of adaptive radiation involving differential use of dietary resources among sympatric species. Here, we apply stable isotope (δ13C, δ15N, and δ2H) analyses of feathers to examine ecological segregation among eight Darwin’s finch species in Santa Cruz Island, Galápagos collected from live birds and museum specimens (1962–2019). We found that δ13C values were higher for the granivorous and herbivorous foraging guilds, and lower for the insectivorous finches. Values of δ15N were similar among foraging guilds but values of δ2H were higher for insectivores, followed by granivores, and lowest for herbivores. The herbivorous guild generally occupied the largest isotopic standard ellipse areas for all isotopic combinations and the insectivorous guild the smallest. Values of δ2H provided better trophic discrimination than those of δ15N possibly due to confounding influences of agricultural inputs of nitrogen. Segregation among guilds was enhanced by portraying guilds in three-dimensional isotope (δ13C, δ15N, and δ2H) space. Values of δ13C and δ15N were higher for feathers of museum specimens than for live birds. We provide evidence that Darwin’s finches on Santa Cruz Island tend to be generalists with overlapping isotopic niches and suggest that dietary overlap may also be more considerable than previously thought.

scholarly journals SEROLOGIC SURVEY OF THE ISLAND SPOTTED SKUNK ON SANTA CRUZ ISLAND

2006 ◽  
Vol 66 (4) ◽  
pp. 456-461 ◽  
Author(s):  
Victoria J. Bakker ◽  
Dirk H. Van Vuren ◽  
Kevin R. Crooks ◽  
Cheryl A. Scott ◽  
Jeffery T. Wilcox ◽  
...  
Keyword(s):  
Santa Cruz Island ◽  
Santa Cruz ◽  
Serologic Survey

Density, reproduction, and group size in feral sheep on Santa Cruz Island, California, USA

Mammalia ◽  
1999 ◽  
Vol 63 (1) ◽  
Author(s):  
L. BOWEN ◽  
D. VAN VUREN
Keyword(s):  
Group Size ◽  
Santa Cruz Island ◽  
Santa Cruz

scholarly journals Spatial Organization of the Island Fox (Urocyon littoralis) on Santa Cruz Island, California

1996 ◽  
Vol 77 (3) ◽  
pp. 801 ◽  
Author(s):  
Kevin R. Crooks ◽  
Dirk van Vuren
Keyword(s):  
Spatial Organization ◽  
Santa Cruz Island ◽  
Santa Cruz ◽  
Island Fox ◽  
Urocyon Littoralis

Identifying Shell Middens With Historic Aerial Photos: An Example From California's Santa Cruz Island

2017 ◽  
Vol 14 (1) ◽  
pp. 113-122 ◽  
Author(s):  
Jon M. Erlandson ◽  
Kristina M. Gill ◽  
Amy E. Gusick ◽  
Adriane E. Dorrler
Keyword(s):  
Santa Cruz Island ◽  
Santa Cruz ◽  
Shell Middens ◽  
Aerial Photos

scholarly journals Prehistoric Shellfish Utilization and Settlement Systems on Western Santa Cruz Island

2018 ◽  
Vol 78 (3) ◽  
pp. 271-284
Author(s):  
Michael A. Glassow
Keyword(s):  
Santa Cruz Island ◽  
Santa Cruz ◽  
Settlement Systems

DEM generation using ASAR (ENVISAT) for addressing the lack of freshwater ecosystems management, Santa Cruz Island, Galapagos

2008 ◽  
Vol 112 (11) ◽  
pp. 4131-4147 ◽  
Author(s):  
Noémi d'Ozouville ◽  
Benoît Deffontaines ◽  
Jérôme Benveniste ◽  
Urs Wegmüller ◽  
Sophie Violette ◽  
...  
Keyword(s):  
Freshwater Ecosystems ◽  
Santa Cruz Island ◽  
Santa Cruz
Sign in / Sign up

Export Citation Format

Share Document