scholarly journals Temporal changes in species composition affect a ubiquitous species’ use of habitat patches

Ecology ◽  
2019 ◽  
Vol 100 (11) ◽  
Author(s):  
Ellen K. Bledsoe ◽  
S. K. Morgan Ernest
Keyword(s):  
Species Composition ◽  
Temporal Changes ◽  
Habitat Patches

scholarly journals Temporal changes in species composition, diversity, and woody vegetation structure of savannas in the Cerrado-Amazon transition zone

2018 ◽  
Vol 32 (2) ◽  
pp. 254-263 ◽  
Author(s):  
Leonardo Maracahipes-Santos ◽  
Josias Oliveira dos Santos ◽  
Simone Matias Reis ◽  
Eddie Lenza
Keyword(s):  
Species Composition ◽  
Transition Zone ◽  
Vegetation Structure ◽  
Temporal Changes ◽  
Woody Vegetation

scholarly journals Partitioning the temporal changes in abundance-based beta diversity into loss and gain components

2021 ◽  
Author(s):  
Shinichi Tatsumi ◽  
Ryosuke Iritani ◽  
Marc W Cadotte
Keyword(s):  
Community Structure ◽  
Species Composition ◽  
Spatial Variation ◽  
Beta Diversity ◽  
Temporal Dynamics ◽  
Species Abundance ◽  
Temporal Changes ◽  
Ecological Communities ◽  
Multiple Site ◽  
Unified Approach

Spatial variation in species composition, or beta diversity, plays a central role in gauging the structure of ecological communities. Here, we develop a new numerical method to partition the impacts of abundance losses and gains on the temporal changes in spatial beta diversity. We show that the temporal changes in pairwise dissimilarity measures (Ruzka and Bray-Curtis indices) and a multiple-site measure (normalized Whittaker's beta) can be partitioned into six terms that reflect the losses and gains in species abundance. Our new method provides a unified approach to disentangle the temporal dynamics of spatial community structure by means of either incidence- or abundance-based data.

Area-specific temporal changes of species composition and species-specific range shifts in rocky-shore mollusks associated with warming Kuroshio Current

2011 ◽  
Vol 158 (9) ◽  
pp. 2095-2107 ◽  
Author(s):  
Takeo Kurihara ◽  
Hideki Takami ◽  
Takeharu Kosuge ◽  
Susumu Chiba ◽  
Masatsugu Iseda ◽  
...  
Keyword(s):  
Species Composition ◽  
Rocky Shore ◽  
Kuroshio Current ◽  
Temporal Changes ◽  
Range Shifts ◽  
Species Specific

scholarly journals Temporal variability of a protected multispecific tropical seagrass meadow in response to environmental change

2019 ◽  
Vol 191 (12) ◽  
Author(s):  
E. Alonso Aller ◽  
J. S. Eklöf ◽  
M. Gullström ◽  
U. Kloiber ◽  
H. W. Linderholm ◽  
...  
Keyword(s):  
Species Composition ◽  
Environmental Change ◽  
Low Income ◽  
Environmental Variables ◽  
Seagrass Meadow ◽  
Spatial Scales ◽  
Temporal Changes ◽  
Climate Impacts ◽  
Seagrass Meadows ◽  
Seagrass Cover

AbstractIn a changing environment, there is an increasing interest to monitor ecosystems to understand their responses to environmental change. Seagrass meadows are highly important ecosystems that are under constant pressure from human activities and climate impacts, with marked declines observed worldwide. Despite increasing efforts, monitoring of multispecific tropical seagrass meadows is scarce, particularly in low-income regions. Based on data from a monitoring programme in a marine protected area in Zanzibar (Tanzania), we assessed temporal changes in seagrass cover and species composition during a 10-year period in relation to local variability in environmental variables. We observed a strong, gradual decline in seagrass cover and changes in species composition, followed by a period of recovery. However, the timing and length of these temporal patterns varied in space (between transects). Multiple environmental variables—cloud cover, temperature, storm occurrence, sunspot activity, and tidal amplitude and height—influenced seagrass cover, although only to a minor extent, suggesting that the monitored seagrass meadow may be influenced by other unmeasured factors (e.g. water currents and sediment movement). Our results show that seagrass meadows can be highly dynamic at small (10–50 m) spatial scales, even in the absence of major local anthropogenic impacts. Our findings suggest that high-resolution monitoring programmes can be highly valuable for the detection of temporal changes in multispecific seagrass meadows; however, to understand the causes of change, there is a need of long-term (> 10 years) data series that include direct measurements of environmental variables and extreme events.

scholarly journals Do Coarser Gap Mosaics in Conifer Plantations Induce More Seed Dispersal by Birds? Temporal Changes during 12 Years after Gap Creation

Forests ◽  
2019 ◽  
Vol 10 (10) ◽  
pp. 918
Author(s):  
Tsubasa Takano ◽  
Yohsuke Kominami ◽  
Hiromi Mizunaga
Keyword(s):  
Seed Dispersal ◽  
Species Composition ◽  
Winter Season ◽  
Temporal Changes ◽  
Canopy Gaps ◽  
Vegetation Development ◽  
Frugivorous Birds ◽  
Α Diversity ◽  
Conifer Plantations ◽  
Gap Creation

The creation of canopy gaps is thought to be an efficient silvicultural operation to diversify species composition of monoculture conifer plantations; however, the shortage of regeneration materials in overclosed plantations is one of the concerns related to this operation. Seed dispersal by frugivorous birds may play an important role in inducing the spread of native broad-leaved trees in canopy gaps in plantations in the warm temperate zone of central Japan because bird-dispersed woody species are abundant in this area. We monitored the dynamics of the abundance and species composition of bird-dispersed seeds over 12 years after gap creation in the canopy of a Japanese cypress (Chamaecyparis obtusa (Siebold et Zucc.) Endl.) plantation. We also studied the effects of gap-mosaic patterns (from many small gaps to fewer large gaps) on dispersal. We used a hierarchical Bayesian zero-inflated Poisson model to analyze the factors affecting seed dispersal by frugivorous birds. Seed dispersal by birds increased with gap age except for just after gap creation. Dispersal in coarser gap mosaics was more abundant than that in finer gap mosaics. The species diversity of dispersed seeds in each seed trap (α-diversity) and plot (γ-diversity) showed similar trends in terms of temporal changes and differences between plots related to seed dispersal abundance; β-diversity did not. These trends might have been caused by shrub-vegetation development after gap creation. The effects of shrub vegetation were classified into the attraction by fruits borne within the vegetation, as well as other effects related to vegetation, such as functions of perch availability and insect presence as a food source. The presence of bird-dispersed seeds was strongly promoted by vegetation in all seasons, but only marginally by the presence of fruit-bearing vegetation. However, fruits attracted seed dispersal by frugivorous birds in the winter season. Our results suggest that both vegetation development and fruiting are important for promoting seed dispersal by frugivorous birds, and those effects are different in different seasons according to vegetation conditions and shifting food resources.

scholarly journals Temporal changes in species composition affect a ubiquitous species’ views of patch quality

2019 ◽  
Author(s):  
Ellen K. Bledsoe ◽  
S. K. Morgan Ernest
Keyword(s):  
Time Series ◽  
Species Composition ◽  
Energy Use ◽  
Time Series Data ◽  
Patch Dynamics ◽  
Temporal Changes ◽  
Series Data ◽  
Patch Quality ◽  
Experimental Time Series ◽  
Rodent Community

AbstractMetacommunity theory, particularly the patch dynamics archetype, suggests that an organism’s perspective of patch quality can depend solely on the local competitive environment. Across landscapes, however, shifts in species composition often co-occur with shifts in habitat, making it difficult to disentangle the role of competitors and environment on assessments of patch quality. Using 26 years of rodent community time-series data, we show that perception of patch quality by a small, ubiquitous granivore (Chaetodipus penicillatus) shifted with both spatial and temporal changes in species composition. In the mid-1990s,C. baileyi, a novel competitor, colonized and the study site.C. penicillatuspatch preference shifted with increasing abundance ofC. baileyi, including corresponding changes in estimated survival, probability of movement between patches, and the arrival of new individuals in patches. Changes in energy use on patches due to the establishment ofC. baileyipoint to a potential mechanism for the differences in patch quality perceived byC. penicillatus. These results demonstrate that experimental time-series data can be used to examine how changes in species composition and, specifically, changes in the competitive landscape, can affect perception of patch quality and patch preference.

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