Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean

Knowledge of the relationship between net primary production (NPP) and export production (EP) in the ocean is required to estimate how the ocean’s biological pump is likely to respond to climate change effects. Here, we show with a theoretical food web model that the relationship between NPP and EP...

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Autores principales:	Edward Laws, Kanchan Maiti
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	biological pump EP food webs model NPP resilience Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
Acceso en línea:	https://doaj.org/article/5e6ee3f5103f4c7995c8ea87e4123cfd
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spelling	oai:doaj.org-article:5e6ee3f5103f4c7995c8ea87e4123cfd2021-11-11T19:56:52ZTemperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean10.3390/w132130852073-4441https://doaj.org/article/5e6ee3f5103f4c7995c8ea87e4123cfd2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4441/13/21/3085https://doaj.org/toc/2073-4441Knowledge of the relationship between net primary production (NPP) and export production (EP) in the ocean is required to estimate how the ocean’s biological pump is likely to respond to climate change effects. Here, we show with a theoretical food web model that the relationship between NPP and EP is obscured by the following phenomena: (1) food web dynamics, which cause EP to be a weighted average of new production (NP) over a previous temperature-dependent time interval that can vary between several weeks at 25 °C to several months at 0 °C and, hence, to be much less temporally variable than NP and (2) the temperature dependence of the resiliency of the food web to perturbations, which causes the return to equilibrium to vary from roughly 50 days at 0 °C to 5–10 days at 25 °C. The implication is that the relationship between NPP and EP can be discerned at tropical and subtropical latitudes if measurements of NPP and EP are averages or climatologies over a timeframe of roughly one month. At high latitudes, however, measurements may need to be averaged over a timeframe of roughly one year because the food webs at high latitudes are very likely far from equilibrium with respect to NPP and EP much of the time, and the model can describe only the average behavior of such physically dynamic systems.Edward LawsKanchan MaitiMDPI AGarticlebiological pumpEPfood websmodelNPPresilienceHydraulic engineeringTC1-978Water supply for domestic and industrial purposesTD201-500ENWater, Vol 13, Iss 3085, p 3085 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	biological pump EP food webs model NPP resilience Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500
spellingShingle	biological pump EP food webs model NPP resilience Hydraulic engineering TC1-978 Water supply for domestic and industrial purposes TD201-500 Edward Laws Kanchan Maiti Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
description	Knowledge of the relationship between net primary production (NPP) and export production (EP) in the ocean is required to estimate how the ocean’s biological pump is likely to respond to climate change effects. Here, we show with a theoretical food web model that the relationship between NPP and EP is obscured by the following phenomena: (1) food web dynamics, which cause EP to be a weighted average of new production (NP) over a previous temperature-dependent time interval that can vary between several weeks at 25 °C to several months at 0 °C and, hence, to be much less temporally variable than NP and (2) the temperature dependence of the resiliency of the food web to perturbations, which causes the return to equilibrium to vary from roughly 50 days at 0 °C to 5–10 days at 25 °C. The implication is that the relationship between NPP and EP can be discerned at tropical and subtropical latitudes if measurements of NPP and EP are averages or climatologies over a timeframe of roughly one month. At high latitudes, however, measurements may need to be averaged over a timeframe of roughly one year because the food webs at high latitudes are very likely far from equilibrium with respect to NPP and EP much of the time, and the model can describe only the average behavior of such physically dynamic systems.
format	article
author	Edward Laws Kanchan Maiti
author_facet	Edward Laws Kanchan Maiti
author_sort	Edward Laws
title	Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
title_short	Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
title_full	Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
title_fullStr	Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
title_full_unstemmed	Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean
title_sort	temperature affects the time required to discern the relationship between primary production and export production in the ocean
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5e6ee3f5103f4c7995c8ea87e4123cfd
work_keys_str_mv	AT edwardlaws temperatureaffectsthetimerequiredtodiscerntherelationshipbetweenprimaryproductionandexportproductionintheocean AT kanchanmaiti temperatureaffectsthetimerequiredtodiscerntherelationshipbetweenprimaryproductionandexportproductionintheocean
_version_	1718431351480254464

Temperature Affects the Time Required to Discern the Relationship between Primary Production and Export Production in the Ocean

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