{"product_id":"primary-production-in-freshwater-von-amy-snook","title":"Primary production in freshwater","description":"\u003cp\u003eFactors regulating composition and relative abundance in phytoplankton communities were investigated in an ancient lake with a highly endemic food web. Lake Matano has genera diversity (21) similar to tropical lakes, but low phytoplankton biomass (0.0162 µg\/L). Vertical mixing physically limits primary production (42% Zeu:Zm); phytoplankton are moved below the euphotic zone. Macronutrient concentrations (0.30 µmol\/L N, 0.13 µmol\/L P) are low. Nutrient bioassays used N and P (30-320 µmol\/L individually, 60:5-1920:160 µmol\/L N:P combined). After 16 days, no significant (p \u0026gt; 0.05) changes in relative abundance and no biologically significant changes in phytoplankton biomass occurred. CHU-10 growth media cultivation, however, significantly increased chl-a. Analysis identified lakewater Cr (0.14 µmol\/L) above a threshold to restrict algal growth (0.12 µmol\/L) and Mo (0.0005 µmol\/L) below requirements by most aquatic life (0.008 µmol\/L). Therefore, physical (mixing) and chemical (toxicity, micronutrient) factors are concluded to limit composition and relative abundance of phytoplankton in Matano.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838341118\"\u003e\u003ch3\u003eInvestigation of factors regulating primary production in the ancient Malili Lakes of Indonesia\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783838341118","offer_id":39498924851293,"sku":"9783838341118","price":59.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/09512c6a-a3d9-4d15-b5dc-6d44bd003b7f.jpg?v=1757739962","url":"https:\/\/shop.autorenwelt.de\/en\/products\/primary-production-in-freshwater-von-amy-snook","provider":"Autorenwelt Shop","version":"1.0","type":"link"}