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Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach

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Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands : an individual-resource network approach. / Santamaria, Silvia; Enoksen, Camilla Aviaaja; Olesen, Jens M.; Tavecchia, Giacomo; Rotger, Andreu; Manuel Igual, Jose; Traveset, Anna.

I: Current Zoology, Bind 66, Nr. 1, 02.2020, s. 39-49.

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Harvard

Santamaria, S, Enoksen, CA, Olesen, JM, Tavecchia, G, Rotger, A, Manuel Igual, J & Traveset, A 2020, 'Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach', Current Zoology, bind 66, nr. 1, s. 39-49. https://doi.org/10.1093/cz/zoz028

APA

Santamaria, S., Enoksen, C. A., Olesen, J. M., Tavecchia, G., Rotger, A., Manuel Igual, J., & Traveset, A. (2020). Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach. Current Zoology, 66(1), 39-49. https://doi.org/10.1093/cz/zoz028

CBE

Santamaria S, Enoksen CA, Olesen JM, Tavecchia G, Rotger A, Manuel Igual J, Traveset A. 2020. Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach. Current Zoology. 66(1):39-49. https://doi.org/10.1093/cz/zoz028

MLA

Vancouver

Santamaria S, Enoksen CA, Olesen JM, Tavecchia G, Rotger A, Manuel Igual J o.a. Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach. Current Zoology. 2020 feb;66(1):39-49. https://doi.org/10.1093/cz/zoz028

Author

Santamaria, Silvia ; Enoksen, Camilla Aviaaja ; Olesen, Jens M. ; Tavecchia, Giacomo ; Rotger, Andreu ; Manuel Igual, Jose ; Traveset, Anna. / Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands : an individual-resource network approach. I: Current Zoology. 2020 ; Bind 66, Nr. 1. s. 39-49.

Bibtex

@article{30a5e9276e73468895c22669d7374eba,
title = "Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands: an individual-resource network approach",
abstract = "Despite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution of trophic resources. Nestedness in resource use among individuals is the most recurrent observed pattern, often accompanied by an absence of modularity, but no previous studies examine bipartite modularity. We use network analysis to describe the diet composition of the Balearic endemic lizard Podarcis lilfordi in 2 islets at population and individual levels, based on the occurrence of food items in fecal samples. Our objectives are to 1) compare niche structure at both levels, 2) characterize niche partition using nestedness and modularity, and 3) assess how size, sex, season, and spatial location influence niche structure. At population-level niche width was wide, but narrow at the level of the individual. Both islet networks were nested, indicating similar ranking of the food preferences among individuals, but also modular, which was partially explained by seasonality. Sex and body size did not notably affect diet composition. Large niche overlap and therefore possibly relaxed competition were observed among females in one of the islets and during spring on both islets. Likewise, higher modularity in autumn suggests that higher competition could lead to specialization in both populations, because resources are usually scarce in this season. The absence of spatial location influence on niche might respond to fine-grained spatio-temporally distribution of food resources. Behavioral traits, not included in this study, could also influence resource partitioning.",
keywords = "Balearic Islands, individual diet composition, individual-level network, modularity, nestedness, population niche width, INTRASPECIFIC COMPETITION, ECOLOGICAL NETWORKS, POPULATION-DENSITY, SPECIALIZATION, NESTEDNESS, PREY, SIZE, MODULARITY, DIVERSITY, DYNAMICS",
author = "Silvia Santamaria and Enoksen, {Camilla Aviaaja} and Olesen, {Jens M.} and Giacomo Tavecchia and Andreu Rotger and {Manuel Igual}, Jose and Anna Traveset",
year = "2020",
month = feb,
doi = "10.1093/cz/zoz028",
language = "English",
volume = "66",
pages = "39--49",
journal = "Current Zoology",
issn = "1674-5507",
publisher = "Oxford University Press",
number = "1",

}

RIS

TY - JOUR

T1 - Diet composition of the lizard Podarcis lilfordi (Lacertidae) on 2 small islands

T2 - an individual-resource network approach

AU - Santamaria, Silvia

AU - Enoksen, Camilla Aviaaja

AU - Olesen, Jens M.

AU - Tavecchia, Giacomo

AU - Rotger, Andreu

AU - Manuel Igual, Jose

AU - Traveset, Anna

PY - 2020/2

Y1 - 2020/2

N2 - Despite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution of trophic resources. Nestedness in resource use among individuals is the most recurrent observed pattern, often accompanied by an absence of modularity, but no previous studies examine bipartite modularity. We use network analysis to describe the diet composition of the Balearic endemic lizard Podarcis lilfordi in 2 islets at population and individual levels, based on the occurrence of food items in fecal samples. Our objectives are to 1) compare niche structure at both levels, 2) characterize niche partition using nestedness and modularity, and 3) assess how size, sex, season, and spatial location influence niche structure. At population-level niche width was wide, but narrow at the level of the individual. Both islet networks were nested, indicating similar ranking of the food preferences among individuals, but also modular, which was partially explained by seasonality. Sex and body size did not notably affect diet composition. Large niche overlap and therefore possibly relaxed competition were observed among females in one of the islets and during spring on both islets. Likewise, higher modularity in autumn suggests that higher competition could lead to specialization in both populations, because resources are usually scarce in this season. The absence of spatial location influence on niche might respond to fine-grained spatio-temporally distribution of food resources. Behavioral traits, not included in this study, could also influence resource partitioning.

AB - Despite it is widely accepted that intrapopulation variation is fundamental to ecological and evolutionary processes, this level of information has only recently been included into network analysis of species/population interactions. When done, it has revealed non-random patterns in the distribution of trophic resources. Nestedness in resource use among individuals is the most recurrent observed pattern, often accompanied by an absence of modularity, but no previous studies examine bipartite modularity. We use network analysis to describe the diet composition of the Balearic endemic lizard Podarcis lilfordi in 2 islets at population and individual levels, based on the occurrence of food items in fecal samples. Our objectives are to 1) compare niche structure at both levels, 2) characterize niche partition using nestedness and modularity, and 3) assess how size, sex, season, and spatial location influence niche structure. At population-level niche width was wide, but narrow at the level of the individual. Both islet networks were nested, indicating similar ranking of the food preferences among individuals, but also modular, which was partially explained by seasonality. Sex and body size did not notably affect diet composition. Large niche overlap and therefore possibly relaxed competition were observed among females in one of the islets and during spring on both islets. Likewise, higher modularity in autumn suggests that higher competition could lead to specialization in both populations, because resources are usually scarce in this season. The absence of spatial location influence on niche might respond to fine-grained spatio-temporally distribution of food resources. Behavioral traits, not included in this study, could also influence resource partitioning.

KW - Balearic Islands

KW - individual diet composition

KW - individual-level network

KW - modularity

KW - nestedness

KW - population niche width

KW - INTRASPECIFIC COMPETITION

KW - ECOLOGICAL NETWORKS

KW - POPULATION-DENSITY

KW - SPECIALIZATION

KW - NESTEDNESS

KW - PREY

KW - SIZE

KW - MODULARITY

KW - DIVERSITY

KW - DYNAMICS

U2 - 10.1093/cz/zoz028

DO - 10.1093/cz/zoz028

M3 - Journal article

C2 - 32467703

VL - 66

SP - 39

EP - 49

JO - Current Zoology

JF - Current Zoology

SN - 1674-5507

IS - 1

ER -