Navigation Links
Declining fortunes of Yellowstone's migratory elk
Date:6/28/2013

In the late spring, the 4000 elk of the Clarks Fork herd leave crowded winter grounds near Cody, Wyoming, following the greening grass into the highlands of the Absaroka Mountains, where they spend the summer growing fat on vegetation fed by snowmelt. It's a short trip (40-60 kilometers) by migratory standards, and by modern standards, uncommonly free of roads, fences, metropolitan areas, and other human-built barriers. But it crosses an important human boundary: the border into Yellowstone National Park.

The costs of migrating to the high green pastures have lately outstripped the benefits, according to a research report in the June issue of the Ecological Society of America's journal Ecology, published last week. Arthur Middleton and colleagues at the University of Wyoming, the Wyoming Game and Fish Department, and the U.S. Geological Survey reported that the migratory Clarks Fork herd has been returning to winter grounds with fewer and fewer calves over the last few decades. Herds that remain in the vicinity of Cody year-round have more surviving calves. Middleton et al. attribute the change in migration fortunes to climate change and a resurgence within the park of predators that hunt newborn elk calves.

In a Forum edited by Marco Festa-Bianchet, of the Universit de Sherbrooke, Qubec, five working groups of ecologists commented on the data, praising Middleton and colleagues' work, but, in some cases, challenging their interpretation. Middleton and colleagues addressed the commentary in a rebuttal.

Historically, migratory hoofed beasts like elk have outnumbered sedentary members of their species by as much as an order of magnitude. John Fryxell, a Forum contributor, wrote a classic paper on this effect in the American Naturalist in 1988. Mig
'/>"/>

Contact: Liza Lester
llester@esa.org
202-833-8773 x211
Ecological Society of America
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Bioeconomy as a solution for South Australias declining forest industry
2. Declining air pollution levels continue to improve life expectancy in US
3. Environmental change impacts on migratory shorebirds differ for males and females
4. New research on migratory behavior of oceanic whitetip sharks can help shape conservation strategies
5. Migratory moths profit from their journey
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/16/2015)... Fingerprint Cards (FPC) raises the revenue guidance for ... at least 340 MSEK to that it will amount to ... growth and orders received the revenue guidance for 2015 is ... will exceed 1,500 MSEK to an updated guidance that revenue ... Due to receipt of orders of touch fingerprint sensors with ...
(Date:6/15/2015)... YORK , June 15, 2015 ... today from Telstra reveals the majority of US consumers using ... them via biometrics, such as fingerprint and voiceprint, instead of ... According to Telstra,s " Mobile Identity   - ... " report, with smartphones now the primary channel used ...
(Date:6/12/2015)... -- Securus Technologies, a leading provider of civil and ... corrections and monitoring, announced the United States Patent ... and identify participants of a video visitation session ... system can: , Identify that the ... process is actually the person participating in the ...
Breaking Biology News(10 mins):Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 2Fingerprint Cards Raises the Revenue Guidance for Q2 2015 and for the Full Year 2015 3One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 2One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 3One in Four US Consumers Would Share Their DNA With Their Bank to Secure Financial and Personal Information, Telstra Report Finds 4Securus Announces Patent Issued for Authorized Presence Verification During Video Visitation 2
... Cell Institute scientists have successfully grown the cells ... human induced pluripotent stem cells (iPSCs), revealing new ... unique approach, the researchers induced the differentiation of ... the surface of the iPSC-derived endothelium mimicking the ...
... sink experiment helped Northwestern University researchers discover that green ... a good cup of tea, but they make an ... red wine, dark chocolate and cacao beans, they found. ... a new way. (Polyphenols are naturally occurring molecules found ...
... Calif. August 22nd, 2013 23andMe, the leading personal genetics ... distensae (stretch marks). Researchers at the company identified ... stretch marks that inform why some individuals are more ... Estimates of the prevalence of stretch marks range from ...
Cached Biology News:Harvard Stem Cell researchers create cells that line blood vessels 2Sticking power of plant polyphenols used in new coatings 2Sticking power of plant polyphenols used in new coatings 323andMe conducts the first genetic study of non-syndromic striae distensae (stretch marks) 2
(Date:7/1/2015)... ... July 01, 2015 , ... ... combat pathogen transmission. CTI’ new Medical Joysticks have an impermeable molecular barrier ... have an operator control device that will increase healthcare worker safety and reduce ...
(Date:6/30/2015)... ... June 30, 2015 , ... Students and ... in the first half of “Integrative Biotechnology,” an applied biotechnology course team-taught by ... 2014, this course combines students from both universities and is taught on both ...
(Date:6/30/2015)... , June 30, 2015  NASA astronaut Kjell ... next month on his first mission to the International ... from 8 to 9 a.m. EDT Tuesday, July 7. ... in Star City, Russia . The interviews ... NASA Television highlighting his mission training. To schedule ...
(Date:6/30/2015)... , ... June 30, 2015 , ... ... Study will provide new insights on mechanics of fecal microbiota transplantation in C. ... to study the microbiome of patients undergoing fecal microbiota transplantation (FMT) as a ...
Breaking Biology Technology:Sanitized Medical Joysticks for a Safer and Healthier Work Environment 2Rivier University and Beijing City University Academic and Cultural Exchanges Begin 2NASA Astronaut Preps for First Space Station Mission, Available for Media Interviews 2uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 2uBiome and OpenBiome Partner for Microbiome Study in FMT Patients 3
... , , ... ... Application Guide ........................................................................................................................2 , ... I. Description ................................................................................................................................2 , ...
... ,,Application Guide, ,I. Description ,II. Product Components ... ,IV. Protocol for Extraction of DNA from Whole ... from Whole Blood ,VI. Quantification of Amplified Products ... , Application Data , References , Contact Information ...
... ,II. Product Components ,III. Materials to ... Extraction of DNA from Buccal Swab ,V. Protocol ... Quantification of Amplified Products ,VII. Purification of ... , References , Contact Information , , ,,Application ...
Cached Biology Technology:Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 2Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 3Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 4Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 5Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 6Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 7Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 8Protocol for GenomePlex Whole Genome Amplification from Formalin-Fixed Parrafin-Embedded (FFPE) tissue 9Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 2Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 3Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 4Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 5Protocol for GenomePlex Whole Genome Amplification ,from Whole Blood 6Protocol for GenomePlex Whole Genome Amplification ,from Buccal Swab 2Protocol for GenomePlex Whole Genome Amplification ,from Buccal Swab 3Protocol for GenomePlex Whole Genome Amplification ,from Buccal Swab 4Protocol for GenomePlex Whole Genome Amplification ,from Buccal Swab 5Protocol for GenomePlex Whole Genome Amplification ,from Buccal Swab 6
Sheep Serum US Origin...
... For the ultimate in utility and flexibility ... meet the needs of the researcher. They ... dimensions or as sheet material that can ... These isolators are autoclavable and non-cytotoxic and ...
2,4-Dinitrophenyl hapten is conjugated to Human Serum Albumin (HSA) protein through lysine....
IC50: 3 ng/ml · Limit of detection: 0.5 ng/ml...
Biology Products: