Heterotrophic glucose uptake and respiration in Lake Kinneret

Berman, T.; Hadas, Ora; Marchaim, U.

doi:10.1007/bf00043545

Cited by 19 publications

(8 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…curred in chamber A prior to diffusion across the membrane (see below) . Similarly to previous observations in Lake Kinneret (Berman & Gerber, 1980 ;Berman et al, 1979) the turnover times for amino acids and glucose were relatively long, averaging 55 hours and 61 hours respectively (Table 1) . Generally turnover times for amino acids were more rapid than those for glucose .…”

Section: Resultssupporting

confidence: 53%

Diffusion chamber studies of carbon flux from living algae to heterotrophic bacteria

Berman

Kaplan

1984

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

The flux of recently photosynthetically fixed, dissolved organic carbon (PDOC) from phototrophs to heterotrophic microorganisms was measured directly in microplankton samples from Lake Kinneret using a diffusion chamber technique . The minimum amounts of PDOC incorporated into small <3 ym heterotrophs during a 12 h light period ranged from 0 .8 to 38 .4 µg (C) 1 -1 , or from 0 .2% to 6% of net primary productivity . Although quantitatively small in comparison with total photosynthetic fixation, this PDOC flux could yield about 2 to 3 X 106 bacterial cells .ml -1 daily . This experimental result is consistent with previous estimates of algal PDOC release in this lake .

show abstract

Section: Resultssupporting

confidence: 53%

Diffusion chamber studies of carbon flux from living algae to heterotrophic bacteria

Berman

Kaplan

1984

Hydrobiologia

Self Cite

View full text Add to dashboard Cite

show abstract

“…The decline of the dinoflagellate always counted. The bacterial dimensions were calibloom in late May or early June supplied the water col- umn and the sediment with organic matter, stimulating bacterial heterotrophic activity (Berman et al 1979, Cavari & Hadas 1979.…”

Section: Methodsmentioning

confidence: 99%

“…With the onset of the Pendinium bloom in February there was a rise in ciliate abundance, concomitant with the increase of particulate organic detritus (e.g. dinoflagellate theca released with each cell division) and dissolved organic matter which stimulated bacterial (Berman et al 1979, Cavari & Hadas 1979 and HNAN outgrowth. As in other freshwater ecosystems, thc numbers of HNAN were highest in spring, coinciding with peaks of chl a and primary production (Nagata 1988, Sanders et al 1989, Munawar et al 1994.…”

Section: Seasonal Patterns Of Protozoa In Lake Kinneretmentioning

confidence: 99%

Seasonal abundance and vertical distribution of Protozoa (flagellates, ciliates), and bacteria in Lake Kinneret, Israel

Hadas¹,

Berman²

1998

Aquat. Microb. Ecol.

View full text Add to dashboard Cite

The seasonal and vertical abundances of ciliates and flagellates are described over a 2 yr period in Lake Kinneret, Israel, a warm rneso-eutroph~c monomictic lake. Ciliate numbers ranged from 3 to 47 cells ml-l. At the thermocline and oxycline region, the h~ghest cillate numbers were observed in autumn, with Coleps hirtus as the dominant speclea. Maximum heterotrophic nanoflagellate abundance (1300 cells ml") was found in the epilimnion In winter-spnng, minimum numbers (66 cells ml-') occurred in autumn. Bacteria ranged from 1 0 h o 3 10' cells ml-l with h~g h e s t numbers at the decline of the Peridinium yatunense bloom and the lowest during ivlnter. Protozoa, especially ciliates, appeared to be important food sources for metazooplankton. Top-down control is a n important factor determining the structure of the microbial loop in Lake Kinneret.

show abstract

“…Several investigations seems to question this however. Berman et al (1979) observed higher respiration percentages of glucose in the summer than in the winter in Lake Kinneret and suggested that respiration was influenced by the nature of the indigenous population a s well as by temperature. Tison and Pope (1980) demonstrated the effect of temperature shifts on the respiration ratios of bacteria using pure cultures and natural populations.…”

mentioning

confidence: 93%

Attached and Free-Floating Bacteria in the Fraser River Estuary, British Columbia, Canada

Bell¹,

Albright²

1981

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

The contribution of free-floating bacteria versus bacteria attached to particulate material to the microbiology of the Fraser River Estuary was assessed. Approximately 60 % of bacterial biomass and heterotrophic activity was associated with suspended particulates in the turbid Fraser River (0 Y&o S). The influence of attached bacteria decreased down the estuary as salinity increased dropping to 15-39 % of total bacterial numbers and 4 % of heterotrophic activity in the Strait of Georgia (26 Ym S). Bacteria, both attached and free-floating, were the predominant part of the microbial population in the river in terms of biomass and productivity. In the Strait of Georgia, however, bacteria constituted only 4 % of the microbial biomass and 25 % of microbial productivity. Heterotrophic activity and productivity were stimulated in the plume (15 % S) to levels higher than those found in either the strait or the river. The percentage glucose respired was always found to be lowest in the river. INTRODUCTIONnoted the importance of detritus with its attached microflora to the dynamics of several estuaries. The relative abundance of free-floating bacteria and Accordingly, we report herein upon biomasses, those attached to suspended matter in aquatic environheterotrophic activities and productivities of free-floatments is controversial. In the open ocean most invesing and attached bacteria within the estuary of the tigators have found that the majority of the planktonic Fraser River through its plume into the saline waters of bacteria are unattached and free-floating (Wiebe and the Strait of Georgia. Pomeroy, 1972;Sieburth et al., 1974;Ferguson and Rublee, 1976; Azam and Hodson, 1977).However, data from various freshwater environments vary. Rieman (1978) observed 50-93 % of glu-MATERIALS AND METHODS cose uptake activity passed through a 1.0 pm Nuclepore filter; however, these percentage values varied Samples were collected from the Fraser River Estuwith the seasons. Burnison (1975) found 82 % of the ary on 6 cruises over a period of 13 months (Table 1). bacterial biomass passed through a 1.0 pm Nuclepore Three stations only were examined during the first 5 filter in samples from the Bay of Quinte. Berman and cruises. The 'river' station was situated approximately Stiller (1977) noted 90 % of carbon uptake in the fil-40 km upstream from the river mouth and the salinity trate from a 3.0 km Nuclepore filtration of Lake Kinwas always 0 % S (Station 10, Fig. 1). Surface water neret water.(1 m) at 15 Om S was chosen as the 'plume' station. This Within estuaries the situation may be even more location varied between Stations 1 and 4 (Fig. l ) complex because of the changing physicochemical and depending on the tide and discharge volume of the biological reactions which occur as the fresh river river. The 'strait' station constituted the third and last water meets the sea water. Unfortunately literature on location lying in the Strait of Georgia midway between bacterial attachment to solid surfaces in estuaries is Vancouv...

show abstract

Heterotrophic glucose uptake and respiration in Lake Kinneret

Cited by 19 publications

References 29 publications

Diffusion chamber studies of carbon flux from living algae to heterotrophic bacteria

Diffusion chamber studies of carbon flux from living algae to heterotrophic bacteria

Seasonal abundance and vertical distribution of Protozoa (flagellates, ciliates), and bacteria in Lake Kinneret, Israel

Attached and Free-Floating Bacteria in the Fraser River Estuary, British Columbia, Canada

Contact Info

Product

Resources

About