Environmental stability increases relative individual specialisation across populations of an aquatic top predator

Oikos ◽  
2017 ◽  
Vol 127 (2) ◽  
pp. 297-305 ◽  
Author(s):  
Philip Dermond ◽  
Stephen M. Thomas ◽  
Jakob Brodersen
Keyword(s):  
Environmental Stability ◽  
Top Predator ◽  
Individual Specialisation

Physical, Chemical, and Crystallographic Characterization of Anodic Coatings on High Strength Aluminum Base Alloys

1976 ◽  
Vol 34 ◽  
pp. 636-637
Author(s):  
R. E. Herfert ◽  
N. T. McDevitt
Keyword(s):  
Sulfuric Acid ◽  
Salt Spray ◽  
High Strength ◽  
Environmental Stability ◽  
Anodic Films ◽  
Sodium Dichromate ◽  
Corrosion Resistant ◽  
Aerospace Applications ◽  
Bond Strengths ◽  
Adhesive Bonded Joints

Durability of adhesive bonded joints in moisture and salt spray environments is essential to USAF aircraft. Structural bonding technology for aerospace applications has depended for many years on the preparation of aluminum surfaces by a sulfuric acid/sodium dichromate (FPL etch) treatment. Recently, specific thin film anodizing techniques, phosphoric acid, and chromic acid anodizing have been developed which not only provide good initial bond strengths but vastly improved environmental durability. These thin anodic films are in contrast to the commonly used thick anodic films such as the sulfuric acid or "hard" sulfuric acid anodic films which are highly corrosion resistant in themselves, but which do not provide good initial bond strengths, particularly in low temperature peel.The objective of this study was to determine the characteristics of anodic films on aluminum alloys that make them corrosion resistant. The chemical composition, physical morphology and structure, and mechanical properties of the thin oxide films were to be defined and correlated with the environmental stability of these surfaces in humidity and salt spray. It is anticipated that anodic film characteristics and corrosion resistance will vary with the anodizing processing conditions.

Prey-field use by a Southern Ocean top predator: enhanced understanding using integrated datasets

2015 ◽  
Vol 526 ◽  
pp. 169-181 ◽  
Author(s):  
M Bedford ◽  
J Melbourne-Thomas ◽  
S Corney ◽  
T Jarvis ◽  
N Kelly ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Top Predator

Testing ecological release as a compensating mechanism for mass mortality in a keystone predator

2020 ◽  
Vol 637 ◽  
pp. 59-69 ◽  
Author(s):  
J Sullivan-Stack ◽  
BA Menge
Keyword(s):  
Community Dynamics ◽  
Limiting Factor ◽  
Sea Star ◽  
Top Predator ◽  
Oregon Coast ◽  
Ecological Release ◽  
Keystone Predator ◽  
Pisaster Ochraceus ◽  
Wasting Syndrome

Top predator decline has been ubiquitous across systems over the past decades and centuries, and predicting changes in resultant community dynamics is a major challenge for ecologists and managers. Ecological release predicts that loss of a limiting factor, such as a dominant competitor or predator, can release a species from control, thus allowing increases in its size, density, and/or distribution. The 2014 sea star wasting syndrome (SSWS) outbreak decimated populations of the keystone predator Pisaster ochraceus along the Oregon coast, USA. This event provided an opportunity to test the predictions of ecological release across a broad spatial scale and determine the role of competitive dynamics in top predator recovery. We hypothesized that after P. ochraceus loss, populations of the subordinate sea star Leptasterias sp. would grow larger, more abundant, and move downshore. We based these predictions on prior research in Washington State showing that Leptasterias sp. competed with P. ochraceus for food. Further, we predicted that ecological release of Leptasterias sp. could provide a bottleneck to P. ochraceus recovery. Using field surveys, we found no clear change in density or distribution in Leptasterias sp. populations post-SSWS, and decreases in body size. In a field experiment, we found no evidence of competition between similar-sized Leptasterias sp. and P. ochraceus. Thus, the mechanisms underlying our predictions were not in effect along the Oregon coast, which we attribute to differences in habitat overlap and food availability between the 2 regions. Our results suggest that response to the loss of a dominant competitor can be unpredictable even when based in theory and previous research.

Wide Color Gamut White Light-Emitting Diode using Quantum Dot/Siloxane Hybrid Encapsulation Material with Excellent Environmental Stability

2019 ◽  
pp. 697
Author(s):  
Junho Jang ◽  
Da-Eun Yoon ◽  
Seung-Mo Kang ◽  
Ilsong Lee ◽  
Doh C. Lee ◽  
...  
Keyword(s):  
Quantum Dot ◽  
White Light ◽  
Light Emitting Diode ◽  
Environmental Stability ◽  
Color Gamut ◽  
Light Emitting ◽  
Wide Color Gamut

EFFECTS OF SILICIC ACID ON ENVIRONMENTAL STABILITY OF SPENT CALCIUM-BASED ARSENIC ADSORBENTS

2018 ◽  
Vol 74 (7) ◽  
pp. III_493-III_502
Author(s):  
Hajime SUGITA ◽  
Terumi OGUMA ◽  
Ming ZHANG ◽  
Junko HARA ◽  
Yoshishige KAWABE
Keyword(s):  
Silicic Acid ◽  
Environmental Stability

Uniaxial Expansion of the 2D Ruddlesden–Popper Perovskite Family for Improved Environmental Stability

2019 ◽  
Vol 141 (13) ◽  
pp. 5518-5534 ◽  
Author(s):  
Ioannis Spanopoulos ◽  
Ido Hadar ◽  
Weijun Ke ◽  
Qing Tu ◽  
Michelle Chen ◽  
...  
Keyword(s):  
Environmental Stability

scholarly journals Facile synthesis of SnO2 shell followed by microwave treatment for high environmental stability of Ag nanoparticles

RSC Advances ◽  
2020 ◽  
Vol 10 (63) ◽  
pp. 38424-38436
Author(s):  
Anna Baranowska-Korczyc ◽  
Ewelina Mackiewicz ◽  
Katarzyna Ranoszek-Soliwoda ◽  
Jarosław Grobelny ◽  
Grzegorz Celichowski
Keyword(s):  
Microwave Irradiation ◽  
Ag Nanoparticles ◽  
Microwave Treatment ◽  
New Method ◽  
Environmental Stability ◽  
Facile Synthesis

This study describes a new method for passivating Ag nanoparticles (AgNPs) with SnO2 layer and their further treatment by microwave irradiation.

scholarly journals Agriculture extension as education to maintain environmental stability: Study in DKI Jakarta

2021 ◽  
Vol 802 (1) ◽  
pp. 012003
Author(s):  
B N Kholila ◽  
T E B Soesilo ◽  
H Herdiansyah
Keyword(s):  
Stability Study ◽  
Environmental Stability ◽  
Agriculture Extension
Sign in / Sign up

Export Citation Format

Share Document