species growth_phase Cylindrotheca_closterium_CCMP_339 exponential Cylindrotheca_closterium_CCMP_339 stationary Cylindrotheca_closterium_CCMP_339 declining Cylindrotheca_closterium_CCMP_339 death Skeletonema_marinoi_CCMP_1332 exponential Skeletonema_marinoi_CCMP_1332 stationary Skeletonema_marinoi_CCMP_1332 declining Skeletonema_marinoi_CCMP_1332 death Thalassiosira_weissflogii_CCMP_1051 exponential Thalassiosira_weissflogii_CCMP_1051 stationary Thalassiosira_weissflogii_CCMP_1051 declining Thalassiosira_weissflogii_CCMP_1051 death