Rosemarie Kentie

Royal Netherlands Institute for Sea Research

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Theunis Piersma

Royal Netherlands Institute for Sea Research

Jos C. E. W. Hooijmeijer

University of Groningen

Tim Coulson

University of Oxford

Shripad Tuljapurkar

Stanford University

Jean‐Michel Gaillard

Université Claude Bernard Lyon 1

Mo A. Verhoeven

Royal Netherlands Institute for Sea Research

Nathan R. Senner

University of Massachusetts Amherst

Wenyun Zuo

Stanford University

Christiaan Both

University of Groningen

Harman Jaggi

Stanford University

Cooperative Institutions

University of Groningen

Royal Netherlands Institute for Sea Research

University of Amsterdam

Netherlands Institute of Ecology

Wageningen University & Research

Utrecht University

Centre for Ecological Research

University of Massachusetts Amherst

University of East Anglia

Fryske Akademy

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[Review of: T. Dee (2018) Landfill : notes on gull watching and trash picking in the anthropocene]

Ibis (2020)

Rosemarie Kentie

Anthropocene

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Variation in Egg Size of Black-Tailed Godwits

Ardea (2020)

Mo A. Verhoeven A. H. Jelle Loonstra Alice D. McBride Joost M. Tinbergen Rosemarie Kentie

As is the case for most avian species, there is considerable variation in the egg size of Continental Black-tailed Godwits Limosa l. limosa breeding in The Netherlands. It is interesting that egg size has costs and benefits yet varies considerably at the population level. To better understand this variation in egg size, we tested its relationship to a suite of individual and environmental factors. We found that egg size can decrease up to 2.8% throughout a breeding season and that egg size increases with clutch size by 1.4% with each additional egg in the clutch. Female body mass and body size explained 5% of the total variation in egg size observed across the population. Furthermore, females wintering south of the Sahara laid 3% smaller eggs than those wintering north of the Sahara. We also found that egg size increases with age, which may indicate age-related differences in the endogenous and/or exogenous conditions of females. The variation in egg size was, however, mostly the result of consistent differences among individuals across years (repeatability = 0.60). A comparison of daughters with mothers suggested that most of this individual repeatability reflects heritable variation (heritability = 0.64). The actual individual traits that underlie this heritable variation among individuals remain mostly undetermined. Smaller eggs did have a slightly lower chance of hatching, but we found no relationship between egg size and chick survival. Finally, nest and chick survival were strongly correlated with lay date. Thus, in Black-tailed Godwits, lay date may actually reflect a female's endogenous and/or exogenous condition at the moment of egg-laying. This finding may be general across birds, since food supplementation experiments usually result in advanced laying and larger clutch sizes rather than in larger eggs.

Avian clutch size

Variation (astronomy)

10.5253/arde.v107i3.a7

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Author response for "Life‐history strategy varies with the strength of competition in a food‐limited ungulate population"

Rosemarie Kentie Sonya M. Clegg Shripad Tuljapurkar Jean‐Michel Gaillard Tim Coulson

Ungulate

10.1111/ele.13470/v2/response1

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Life‐history strategy varies with the strength of competition in a food‐limited ungulate population

Ecology Letters (2020)

Rosemarie Kentie Sonya M. Clegg Shripad Tuljapurkar Jean‐Michel Gaillard Tim Coulson

Abstract Fluctuating population density in stochastic environments can contribute to maintain life‐history variation within populations via density‐dependent selection. We used individual‐based data from a population of Soay sheep to examine variation in life‐history strategies at high and low population density. We incorporated life‐history trade‐offs among survival, reproduction and body mass growth into structured population models and found support for the prediction that different life‐history strategies are optimal at low and high population densities. Shorter generation times and lower asymptotic body mass were selected for in high‐density environments even though heavier individuals had higher probabilities to survive and reproduce. In contrast, greater asymptotic body mass and longer generation times were optimal at low population density. If populations fluctuate between high density when resources are scarce, and low densities when they are abundant, the variation in density will generate fluctuating selection for different life‐history strategies, that could act to maintain life‐history variation.

Density dependence

Ungulate

Population density

Life History Theory

Variation (astronomy)

10.1111/ele.13470

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Reproductive timing and investment in relation to spring warming and advancing agricultural schedules

Journal of Ornithology (2011)

Julia Schroeder Theunis Piersma Niko M. Groen Jos C. E. W. Hooijmeijer Rosemarie Kentie

Advances in mowing schedules have led to early and rapid declines in the seasonal food availability for, and survival rates of, chicks of grassland-breeding waders. Concurrently, increased levels of soil fertilization may have improved food abundance for adults. These developments are assumed to have resulted in an advancement of laying during 1930–1976 in several meadowbird species, including Black-tailed Godwits. Despite an apparent selective advantage of early breeding, after 1976 Godwits stopped advancing their laying dates. We have analyzed the timing of breeding and reproductive investment in Dutch Black-tailed Godwits relative to recent changes in agricultural practices and climate during 1976–2007. Early and late spring temperatures and precipitation in March were used as indicators for the timing of fertilizer application and mowing, and also as qualitative measures of relative food availability for adults and chicks. When precipitation was higher in March, Black-tailed Godwits laid earlier. Following warmer winters, the earliest females laid larger eggs, which hatched heavier chicks with a higher survival probability. We suggest that the positive effect of an increasing March precipitation on invertebrate abundance may be constrained by the current policy of rigid control of the water table. This policy prevents Godwits from further advancing laying dates, which would increase their chick's survival prospects under increasingly early mowing schedules. Policy-makers should, next to delaying mowing schedules, also consider reduced draining in early spring as a tool to help stop the population decline of the Black-tailed Godwit.

10.1007/s10336-011-0747-5

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Abdominally implanted satellite transmitters affect reproduction and survival rather than migration of large shorebirds

Journal of Ornithology (2013)

Jos C. E. W. Hooijmeijer Robert E. Gill Daniel M. Mulcahy T. Lee Tibbitts Rosemarie Kentie

Fledge

Coelom

Avian clutch size

Charadriiformes

10.1007/s10336-013-1026-4

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Citations (20)

sheep data 1986 to 1996.csv

Figshare (2020)

Rosemarie Kentie Sonya M. Clegg Shripad Tuljapurkar Jean‐Michel Gaillard Tim Coulson

This dataset is used in the analysis for Kentie, R., Clegg, S.M., Tuljapurkar, S., Gaillard, J.-M. & Coulson, T. (accepted). Life history strategy varies with the strength of competition in a food-limited ungulate population. Ecology Letters.
Note that this dataset is previously published in Coulson, T. (2012). Integral projections models, their construction and use in posing hypotheses in ecology. Oikos, 121, 1337-1350. Coulosn acknowledges the Soay sheep project, and particularly Josephine Pemberton, Tim Clutton-Brock and Loeske Kruuk, for agreeing that the data this paper is based upon can be made publically available.

10.6084/m9.figshare.11611911

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Experimental evidence for the effects of muskrat control (Ondatrazibethicus) on abundance in The Netherlands

Julius-Kühn-Archiv (2018)

Daan Bos Rosemarie Kentie Maurice LaHaye Ron Ydenberg

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Quantifying landscape‐level land‐use intensity patterns through radar‐based remote sensing

Journal of Applied Ecology (2018)

Ruth A. Howison Theunis Piersma Rosemarie Kentie Jos C. E. W. Hooijmeijer Han Olff

Abstract The increasing availability of high resolution and high frequency, radar‐based remote sensing data (i.e. observations on land surface characteristics, insensitive to cloud interference), makes it possible to track land‐use intensity more precisely at the whole landscape scale. Here, we develop a new radar‐based remote sensing technique for large‐scale quantification of agricultural land‐use intensity across human‐dominated landscapes. We compare the respective abilities of Sentinel‐1 C‐band radar (C‐ SAR , C‐band synthetic aperture radar) remote sensing data with the more traditional optical data, as MODIS enhanced vegetation indices ( MODIS EVI ), in capturing seasonality and the magnitude of land‐use intensity (quantity and frequency of biomass removal). Linking our novel radar‐based change detection algorithm to agricultural management activities on the ground, we quantify a whole landscape according to timing of mowing, a key grassland disturbance, thus capturing the dynamics of mowing regimes in grasslands. We found that the radar‐based proxy provides a rapid and reliable measure of land‐use intensity, reliably predicting plant community composition at the landscape scale. We tested this methodology using data on black‐tailed godwits ( Limosa limosa limosa ), a specialist breeder of lowland meadows which, over the last 50 years, has shown dramatic declines. During territory establishment, black‐tailed godwits preferentially used fields corresponding to intermediate radar‐sensed land‐use intensities. However, the present‐day timing of mowing in these habitats was such that most godwit broods were less likely to be successful than broods in grasslands used at a lower intensity. Synthesis and applications . The newly developed radar‐based land‐use intensity quantification is a powerful tool that makes it possible for ecologists and land managers to include agricultural land‐use intensity measurements in population studies of the plants, insects, birds and mammals using these landscapes, at the spatial scale of entire populations. Applications of this tool include evaluating the effectiveness of European agri‐environment schemes aiming to increase biodiversity through decreased land‐use intensity or expanding the quantification of agricultural land‐use intensity to other geographic regions.

10.1111/1365-2664.13077

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Wintering on different continents: Effects on breeding parameters of Black-tailed Godwits

Rosemarie Kentie

Rosemarie Kentie1, Rocio Marquez-Ferrando2, Jos Hooijmeijer1, Jordi Figuerola2, Theunis Piersma1,3 1 Conservation Ecology Group, Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, PO Box 11103, 9700 CC Groningen, The Netherlands, 2 Department of Wetland Ecology, Estacion Biologica de Donana-CSIC, Avda. Americo Vespucio s/n, Sevilla 41092, Spain, 3 NIOZ Department of Marine Ecology, Royal Netherlands Institute for Sea Research, PO Box 59, 1790 AB Den Burg, Texel, The Netherlands

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