Spatial niche partitioning of two saproxylic sibling species (Coleoptera, Cetoniidae, genusGnorimus)

2013 ◽  
Vol 7 (3) ◽  
pp. 223-231 ◽  
Author(s):  
Marco Trizzino ◽  
Francesco Bisi ◽  
Carlo E. Morelli ◽  
Damiano G. Preatoni ◽  
Lucas A. Wauters ◽  
...  
Keyword(s):  
Sibling Species ◽  
Niche Partitioning ◽  
Spatial Niche

scholarly journals The morphological diversity of Osedax worm borings (Annelida: Siboglinidae)

2014 ◽  
Vol 94 (7) ◽  
pp. 1429-1439 ◽  
Author(s):  
Nicholas D. Higgs ◽  
Adrian G. Glover ◽  
Thomas G. Dahlgren ◽  
Craig R. Smith ◽  
Yoshihiro Fujiwara ◽  
...  
Keyword(s):  
Niche Partitioning ◽  
Three Dimensional ◽  
Morphological Diversity ◽  
Morphological Data ◽  
Micro Computed Tomography ◽  
Fossil Bones ◽  
Spatial Niche ◽  
Multiple Species ◽  
Root Tissues ◽  
Marine Worms

Marine worms in the genus Osedax, have specialized ‘root’ tissues used to bore into the bones of decomposing vertebrate skeletons and obtain nutrition. We investigated the borings of nine Osedax species, using micro computed tomography to quantitatively describe the morphology of the borings and provide three-dimensional reconstructions of the space occupied by Osedax root tissues inside the bone. Each Osedax species displayed a consistent boring morphology in any given bone, but these differed between bones. In bones where multiple species coexisted there was limited evidence for spatial niche partitioning by Osedax root tissues inside the bones investigated here. The new morphological data may be applied to Osedax traces in fossil bones, showing that borings can be used to indicate minimum species richness in these bones.

Co-occurrence patterns of rodents at multiple spatial scales: competitive release of generalists following habitat loss?

2019 ◽  
Vol 100 (4) ◽  
pp. 1229-1242 ◽  
Author(s):  
Thomas Püttker ◽  
Camila S Barros ◽  
Bruno T Pinotti ◽  
Adriana A Bueno ◽  
Renata Pardini
Keyword(s):  
Habitat Loss ◽  
Spatial Scales ◽  
Niche Partitioning ◽  
Large Data ◽  
Data Set ◽  
Generalist Species ◽  
Competitive Release ◽  
Spatial Niche ◽  
Habitat Generalist ◽  
Occurrence Patterns

AbstractTheory predicts that habitat generalist species are excluded by specialist species in optimal habitat for specialists, and empirical data commonly show a shift from specialist- to generalist-dominated communities following disturbance. We investigated co-occurrence patterns of habitat generalist and specialist terrestrial rodents at two spatial scales in the Atlantic Forest, aiming at evaluating the following hypotheses: 1) within-patch spatial niche partitioning promotes coexistence of generalists and specialists, leading to checkerboard presence-absence patterns at small (within-patch) rather than large (among-patch) scales; and 2) the decrease in abundance of specialists due to habitat loss promotes a competitive release of generalists, leading to negative covariance in abundance between generalists and specialists among patches. Drawing on a large data set including 363 sites within three patches in continuous forest, and 45 patches within three landscapes, we used C-scores based on presence-absence and abundance data to evaluate spatial segregation. We found consistent segregation between specialists and generalists at the within-patch rather than among-patch scale, but no consistent negative covariance in abundance between generalists and specialists among patches (as covarying species pairs varied across landscapes). Our findings suggest that spatial patterns caused by competition are scale-dependent, and coexistence of generalists and specialists is promoted by within-patch spatial niche partitioning. However, the influence of competitive release on the proliferation of generalists may be outweighed by other factors in fragmented landscapes.A teoria ecológica prevê que espécies generalistas de habitat são excluídas por espécies especialistas em hábitats ótimos para as especialistas, e dados empíricos comumente mostram uma mudança de dominância das comunidades - de especialistas para generalistas - após distúrbios. Nós investigamos os padrões de coocorrência de roedores terrestres generalistas e especialistas de habitat em duas escalas espaciais na Mata Atlântica, para testar as seguintes hipóteses: 1) a partição espacial do nicho dento de fragmentos promove a coexistência de generalistas e especialistas, levando a padrões de presença-ausência “tabuleiro de damas” em escalas pequenas (dentro de fragmento) mas não em escalas grandes (entre fragmentos); 2) a diminuição da abundância de especialistas devido à perda de habitat promove uma liberação competitiva de generalistas, levando a covariância negativa da abundância de generalistas e especialistas entre fragmentos. A partir de um grande banco de dados - 363 sítios dentro de três fragmentos de floresta contínua, e 45 fragmentos dentro de três paisagens, usamos C-scores baseados em dados de presença/ausência e abundância para avaliar a segregação espacial. Encontramos segregação consistente entre especialistas e generalistas na escala menor (dentro de fragmentos) e não na maior (entre fragmentos), mas não encontramos covariância negativa na abundância de generalistas e especialistas entre fragmentos (dado que os pares de espécies que covariaram mudou entre as paisagens). Nossos resultados sugerem que padrões espaciais causados por competição são dependentes de escala, e que a coexistência de generalistas e especialistas é promovida pela partição espacial de nicho dentro dos fragmentos. No entanto, a influência da liberação competitiva na proliferação de generalistas pode ser superada por outros fatores em paisagens fragmentadas.

scholarly journals Spatial niche partitioning among three small cetaceans in the eastern coastal area of Hokkaido, Japan

2020 ◽  
Vol 637 ◽  
pp. 209-223
Author(s):  
Y Iwahara ◽  
H Shirakawa ◽  
K Miyashita ◽  
Y Mitani
Keyword(s):  
Water Depth ◽  
Marine Mammals ◽  
Niche Partitioning ◽  
Niche Overlap ◽  
The Other ◽  
Potential Prey ◽  
Harbor Porpoise ◽  
Prey Distribution ◽  
Marine Predator ◽  
Spatial Niche

Spatial niche partitioning of marine mammals is thought to be caused by dietary differences. However, due to the difficulty involved with conducting simultaneous marine predator and prey distribution surveys at the same scale, marine mammals have not been studied alongside their prey distribution. To understand the spatial niche overlap between 3 small cetaceans observed in the eastern coastal waters of Hokkaido, Japan (Pacific white-sided dolphin Lagenorhynchus obliquidens, Dall’s porpoise Phocoenoides dalli, and harbor porpoise Phocoena phocoena), and the mechanisms behind the differences in their distributions, visual and hydroacoustic surveys using a quantitative echosounder were concurrently conducted. A clear spatial niche overlap was observed between the Pacific white-sided dolphin and Dall’s porpoise, whereas the spatial overlap was moderate between the harbor porpoise and the other 2 species. In areas where Pacific white-sided dolphins were observed, potential prey was abundant in a shallower layer, at approximately 80-90 m depth. On the other hand, potential prey was more abundant in deeper layers in areas where Dall’s and harbor porpoises were observed. Water depth affected the potential prey abundance at all depth layers (0-300 m), as potential prey were more abundant in areas with a shallower water depth. Additionally, potential prey were more abundant in shallower layers (3-200 m) than in deeper layers (200-300 m), where the maximum water depth was 3000 m. The differences in spatial niche among Pacific white-sided dolphin, Dall’s porpoise, and harbor porpoise might cause their dietary differences, as they are epipelagic feeders, midwater feeders, and both epipelagic and midwater feeders, respectively.

Vertical niche partitioning between cryptic sibling species of a cosmopolitan marine planktonic protist

2012 ◽  
Vol 21 (16) ◽  
pp. 4063-4073 ◽  
Author(s):  
AGNES WEINER ◽  
RALF AURAHS ◽  
ATSUSHI KURASAWA ◽  
HIROSHI KITAZATO ◽  
MICHAL KUCERA
Keyword(s):  
Sibling Species ◽  
Niche Partitioning

scholarly journals Spatial Niche Partitioning in Sub-Tropical Solitary Ungulates: Four-Horned Antelope and Barking Deer in Nepal

PLoS ONE ◽  
2015 ◽  
Vol 10 (2) ◽  
pp. e0117917 ◽  
Author(s):  
Krishna Prasad Pokharel ◽  
Tobias Ludwig ◽  
Ilse Storch
Keyword(s):  
Niche Partitioning ◽  
Spatial Niche
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