trophogenic

Examples

• All

• The bottom of the trophogenic zone, below which there is no phytoplankton productivity, is effectively 20 m in this lake, which corresponds to the depth of 0.5% light penetration and the depth of the primary chemodine (see Figure 1).

  Academic text (1999)

• On an annual basis, average daily areal respiration in the trophogenic zone is almost 20% lower than the average during the growing season (early September through early April) due to the extended period of winter darkness, when phytoplankton respiration and photosynthetic excretion of dissolved organic carbon are absent from the water column.

  Academic text (1999)

• Consequently, it is difficult to relate the concentration of dissolved oxygen in the trophogenic zone to autochthonous metabolism within this zone.

  Academic text (1999)

• The large imbalance between sinking flux and production within the trophogenic zone indicates the overwhelming importance of sinking matter originating from the ice cover.

  Academic text (1999)

• Respiration rates in the trophogenic zone (4.5-20 m) from late August to early April are approximately 70% of the total water column respiration.

  Academic text (1999)

• Sinking fluxes to the aphotic zone were determined with sediment traps suspended at the bottom of the trophogenic zone (20 m).

  Academic text (1999)

• Stream flow provides less than 0.1% per year to the dissolved organic pool in the trophogenic zone; ice flux has yet to be measured, although particulate organic carbon flux from the ice is thought to be high (Figure 7).

  Academic text (1999)

• Another interesting feature of the carbon flux in Lake Bonney is the relatively large amounts of dissolved inorganic carbon and dissolved organic carbon that enter the trophogenic zone via upward diffusion across the chemocline.

  Academic text (1999)

• Diffusive fluxes of dissolved inorganic carbon (DIC) and dissolved organic carbon (DOC) are based on gradients across the 18 m plane (i.e., near the bottom of the trophogenic zone).

  Academic text (1999)

• Figure 5. Net primary production to respiration (P:R) ratios for the trophogenic zone (4.5-20 m; solid bars) and the entire water column (4.5-$0 m; gray bars) from 1993 to 1997 in the east lobe of Lake Bonney.

  Academic text (1999)

Synonyms

T

trophic

vstrophogenic

• Specialized

2 8.8

How animals and plants get food and how that food moves through a food chain

focuses on promoting nutrient production and growth rather than feeding

Surface Forms

Morphology

Etymology