@incollection{fdi:010078626, title = {{B}iomass, size structure and trophic compartments of the metazooplankton in the {S}ontecomapan lagoon ({V}eracruz, {M}exico)}, author = {{B}enitez-{D}iaz {M}iron, {M}.{I}. and {C}astellanos-{P}aez, {M}.{E}. and {G}arza-{M}ourino, {G}. and {F}errara-{G}uerrero, {M}.{J}. and {P}agano, {M}arc}, editor = {}, language = {{ENG}}, abstract = {{I}n this chapter, based on re-analysis of previous published data, we study the biomass, trophic component and size structure of the zooplankton in the {S}ontecomapan {L}agoon, in order to better evaluate its trophic status and assess its possible incidence on food transfers, eutrophication and terminal productivity in this lagoon. {O}ur results show very low values of zooplankton/phytoplankton ratio, compared to literature data, revealing an overall low food-transfer at the basis of the food chain. {T}he size-structure is in average dominated by small organisms which suggests a predation impact from fish on larger organisms (calanoid copepods). {T}his impact was particularly important during the north wind season perhaps in relation with the breeding cycles of important fish species such as {C}athorops aguadulce. {H}owever, tidal inputs of large-sized coastal marine organisms (e.g. {P}aracalanus aculeatus, {T}emora turbinata and {C}entropages velificatus) seems to compensate this "erosion" of large zooplankton in the region close to the communication channel. {O}ur data analyses confirm the top-down effect on zooplankton, but also show that bottom-up forces affect phytoplankton ({NH}4 limitation) and zooplankton (phytoplankton limitation), meanwhile the top-down control by herbivorous zooplankton on phytoplankton is very low (inf. 10% of the phytoplankton stock day).}, keywords = {{LAGON} ; {ZONE} {COTIERE} ; {LAGON} ; {ZONE} {COTIERE} ; {FONCTIONNEMENT} {DE} {L}'{ECOSYSTEME} ; {ZOOPLANCTON} ; {BIOMASSE} ; {STRUCTURE} {TROPHIQUE} ; {PHYTOPLANCTON} ; {ETUDE} {COMPARATIVE} ; {MEXIQUE} ; {ZONE} {TROPICALE} ; {MEXIQUE} {GOLFE}}, booktitle = {{E}cology of the {S}ontecomapan lagoon, {V}eracruz}, numero = {}, pages = {155--176}, address = {{M}exico}, publisher = {{UAM} ; {IRD}}, series = {}, year = {2018}, ISBN = {9786072815155}, URL = {https://www.documentation.ird.fr/hor/fdi:010078626}, }