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{| class="model-ib" style="float:right; margin-left:1em; margin-bottom:1em;" ! Phytoplankton net growth rate (cell counting) |- | '''Approach:''' FCM or microscopy cell counts in time-course incubations |- | '''Context:''' incubation |- | '''Spatial scale:''' point sample |-..."

2026-05-14T00:37:50Z

Created page with "{{BreadcrumbsInteractions}} * Page authors: PRIMO * Responsible curator: Hagen Buck-Wiese ---- __TOC__ <div class="model-box"> {| class="model-ib" style="float:right; margin-left:1em; margin-bottom:1em;" ! Phytoplankton net growth rate (cell counting) |- | '''Approach:''' FCM or microscopy cell counts in time-course incubations |- | '''Context:''' incubation |- | '''Spatial scale:''' point sample |-..."

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* [[Page authors|Page authors]]: [[PRIMO]]
* [[Responsible curator|Responsible curator]]: [[User:Hagi BucknWise|Hagen Buck-Wiese]]
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__TOC__
<div class="model-box">
{| class="model-ib" style="float:right; margin-left:1em; margin-bottom:1em;"
! Phytoplankton net growth rate (cell counting)
|-
| '''Approach:''' FCM or microscopy cell counts in time-course incubations
|-
| '''Context:''' incubation
|-
| '''Spatial scale:''' point sample
|-
| '''Temporal scale:''' hours
|-
| '''Units:''' d<sup>-1</sup> (net growth rate)
|-
| '''Community captured:''' varies (FCM-resolvable populations or microscopy-counted taxa)
|-
| '''Co-measurements:''' (none specified)
|}
</div>
<div style="clear:both"></div>

== Method Overview ==

Cell abundance is tracked over the course of incubation experiments using flow cytometry (FCM) or epifluorescence microscopy. The rate of change in cell concentration over time gives the net growth rate of the incubated population. When paired with dilution treatments (see [[Incubation dilution experiments]]), cell counting separates the contributions of growth and grazing to the net change in abundance. In the absence of dilution, the net growth rate (k = µ − g) is obtained directly; resolving µ and g requires an additional experimental manipulation.

=== Scale of measurement ===

Point samples after hours of incubation.

=== Data generated ===

Net phytoplankton growth rate (d<sup>-1</sup>) for each counted population. When combined with a dilution series, specific growth rate (µ) and grazing rate (g) are resolved.

=== Units & currency ===

Units are d<sup>-1</sup>. The currency is cells.

=== Sample size ===

Typical samples are < 1 L in volume.

=== Repositories & databases ===

== Limitations ==

Cell counting alone gives the net rate (µ − g); resolving growth from grazing requires additional experimental manipulation (dilution, additions). FCM cannot distinguish living from recently dead cells, which can bias estimates.

== Example Applications & Protocols ==

=== Classic examples ===
*

=== Recent applications ===
*

=== Common calculations/conversions ===
* Net growth rate k (d<sup>-1</sup>) = ln(N<sub>final</sub>/N<sub>initial</sub>) / t.

== References ==

[[Category:Main Pages|Model types]]

Cell abundance - Revision history