10.5061/DRYAD.2K0S6
Bishop, Ian W.
University of Colorado Boulder
Spaulding, Sarah A.
University of Colorado Boulder
Data from: Life cycle size dynamics in Didymosphenia geminata
(Bacillariophytceae)
Dryad
dataset
2018
size restoration
FlowCam
finite mixture modeling
size reduction
Bacillariophyceae
Didymosphenia geminata
2018-01-10T00:00:00Z
2018-01-10T00:00:00Z
en
https://doi.org/10.1111/jpy.12528
5255887 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Didymosphenia geminata has received a great deal of attention in the last
25 years, and considerable effort has gone into determining the origin,
ecological impact, and economic consequences of its invasive behavior.
While environmental conditions are a controlling influence in
distribution, the extreme success of the species may be tied to its basic
biology and life history. Little is known, however, about population
dynamics, size restoration and reproduction of D. geminata. The objective
of this study was to determine the temporal patterns in cell size
frequency, size restoration strategy, and synchronization of life cycles
between populations in close proximity. We implemented FlowCam technology
to measure the length of more than 100,000 D. geminata cells from two
sites in South Boulder Creek, Colorado over 1 year. We applied finite
mixture modeling to uncover temporal patterns in size distribution. Our
results show that collections of D. geminata exhibited a complex,
multimodal size distribution, almost always containing four overlapping
age cohorts. We failed to observe direct visual evidence of the sexual
phase. Multiple abrupt and directional shifts in size distribution,
however, were documented providing conclusive evidence of cell size
restoration. Lastly, nodules in close proximity were asynchronous with
respect to size frequency profiles and size diminution, highlighting the
relevance of spatial heterogeneity in in situ diatom size dynamics. This
study is the first to document the complexity of diatom cell size
distribution in a lotic system, size restoration in D. geminata, and the
variability in rates of size reduction at microhabitat spatial scales.
Apical length measurements of Didymosphenia geminata from South Boulder
Creek, Colorado USAThis apical length dataset was collected using a Fluid
Imaging FlowCam in 2013. Length measurements (in micrometers) of D.
geminata valves were exported from VisualSpreadsheet, Fluid Imaging,
Inc.'s proprietary FlowCam software. This .csv file contains (in long
format) all the length measurements analyzed for this study along with
their collection date, the accessioned sample at INSTAAR from which they
derive, the collection locality, and that locality's latitude and
longitude in decimal degrees (WGS84 datum).Dryad_data_20161220.csv