Connecting foraging and roosting areas reveals how food stocks explain shorebird numbers

نویسندگان

چکیده

Shorebird populations, especially those feeding on shellfish, have strongly declined in recent decades and identifying the drivers of these declines is important for conservation. Changing food stocks are thought to be a key driver may also explain why trends not been uniform across Europe's largest estuary. We therefore investigated how winter population Eurasian oystercatchers (Haematopus ostralegus) were linked availability Dutch Wadden Sea. Our analysis incorporated two spatial scales, smaller scale focused roost counting areas available birds larger tidal basins. A novelty our study that we quantify connectivity between roosting foraging areas, identified from GPS tracking data. This allowed us estimate thus local trends. At there was no clear relationship number oystercatchers, indicating other factors drive fluctuations at finer scales. basins, however, significant food, cockle Cerastoderma edule,. Mortality recruitment alone could account large bird counts, suggesting site choice wintering migratory primarily fluctuations. Furthermore, oystercatcher abundance benthic stocks, suggests shorebird counts act as ecological indicators ecosystem health, informing about status

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

How to Keep Numbers up and Inbreeding down in Supplemented Stocks

Supplemental breeding is an intensive population management strategy wherein adults are captured from nature and spawned in controlled settings, and the resulting offspring are later released into the wild. To be effective, supplemental breeding programs require crossing strategies that maximize offspring production while maintaining genetic diversity within each supplemental year class. We use...

متن کامل

The past and future of food stocks

Human societies rely on food reserves and the importation of agricultural goods asmeans to copewith crop failures and associated food shortage.While food trade has been the subject of intensive investigations in recent years, food reserves remain poorly quantified. It is unclear how food stocks are changing andwhether they are declining. In this studywe use food stock records for 92 products to...

متن کامل

Fishy numbers for white marlin stocks.

In 1840, the English chaplain and amateur naturalist Richard Thomas Lowe published a four-line description of a proposed new species of fish. It was a billfish: a big, fast predatory fish with a prominent bill. The billfish group includes the storied marlins immortalized by Ernest Hemingway. Lowe based his description on a single specimen collected off the coast of Madeira, Portugal, where he h...

متن کامل

Roosting and Foraging Social Structure of the Endangered Indiana Bat (Myotis sodalis)

Social dynamics are an important but poorly understood aspect of bat ecology. Herein we use a combination of graph theoretic and spatial approaches to describe the roost and social network characteristics and foraging associations of an Indiana bat (Myotis sodalis) maternity colony in an agricultural landscape in Ohio, USA. We tracked 46 bats to 50 roosts (423 total relocations) and collected 2...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Estuarine Coastal and Shelf Science

سال: 2021

ISSN: ['1096-0015', '0272-7714']

DOI: https://doi.org/10.1016/j.ecss.2021.107458