Spatiotemporal Changes in the Phytoplankton in Lake Baikal during Late Summer: I. Water Temperature and Phytoplankton Abundance

Estuari di wilayah Kabupaten Banyuasin dengan potensi biodiversitas sumber daya ikan yang tinggi, merupakan wilayah penangkapan yang potensial dan berkontribusi besar terhadap poduksi perikanan Provinsi Sumatera Selatan. Distribusi biomassa sumber daya ikan di wilayah estuari sangat dinamis dan dipengaruhi oleh parameter salinitas dan suhu perairan pada suatu lingkungan perairan. Penelitian ini bertujuan untuk mengetahui kondisi kepadatan biomassa ikan dalam hubungannya dengan kondisi lingkungan perairan di wilayah perairan estuari Kabupaten Banyuasin.Pengambilan sampel ikan dilakukan dengan percobaan penangkapan menggunakan alat tangkap trawl mini yang diopeasikan di tiga wilayah estuari yaitu Sungai Banyuasin, Sungai Musi dan Sungai Upang. Pada masing-masing wilayah estuari ditentukan sebanyak empat lokasi sampling. Frekuensi pengambilan sampel dilakukan sebanyak empat kali yaitu pada Maret, Juni, Agustus dan Oktober agar mewakili kondisi musiman.Parameter lingkungan yang dianalisa adalah salinitas, suhu perairan, kecerahan, nitrat, amoniak, total fosfat dan kelimpahan fitoplankton. Hasil penelitian menunjukkan sebanyak 87 spesies ikan telah teridentifikasi. Diperoleh nilai kepadatan biomassa 332,13 – 861,49 kg/km2 di estuari Upang, 590,51 – 2.235,04 kg/km2 di estuari Musi dan 1.296,4 - 33.714,88 kg/km2 di estuari Banyuasin. Spesies ubur-ubur (Aurelia aurita) mendominasi tangkapan pada Agustus hingga Oktober yang mencapai 77,22% dari biomassa total ikan dikarenakan lingkungan yang sesuai untuk keperluan pertumbuhannya. Kepadatan biomassa ikan berkorelasi positif dengan parameter salinitas dan kelimpahan fitoplankton, dan berkorelasi negatif terhadap parameter amoniak. Estuaries of Banyuasin district has a high biodiversity of fish resources and significant contribution to the fisheries production in the South Sumatera Province. The biomass distribution of fish in the estuary fluctuated and probably affected by by salinity and water temperature. This research aims to investigate the correlation between biomass density and environment condition in the estuary of Banyuasin Regency. Sampling was conducted through experimental fishing used a mini trawl that operated in three estuary areas, such as: Banyuasin Rivers, Musi Rivers, and Upang Rivers. Every estuary area was replicated for four sampling sites. Samples were collected during March, June, August and October. The waters parameters analyzed were salinity, water temperature, transparency, nitrate, ammonia, phosphate total, and phytoplankton. The results showed that about 87 species of fish have been identified. The biomass density was 332,13 – 861,49 kg/km2 in estuary Upang, 590,51 – 2.235,04 kg/km2 in estuary Musi and 1.296,4 - 33.714,88 kg/km2 in estuari Banyuasin. A jelly fish (Aurelia aurita) is dominated in August to October, up to 77.22% of total biomass. The biomass density of fish was positively correlated with salinity and phytoplankton abundance, whereas negatively correlated to ammoniac condition.

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Seasonal occurrence of Conidia of Aquatic Hyphomycetes (Fungi) in Lees Creek, Australian Capital Territory

Marine and Freshwater Research ◽

10.1071/mf9890011 ◽

1989 ◽

Vol 40 (1) ◽

pp. 11 ◽

Cited By ~ 17

Author(s):

K Thomas ◽

GA Chilvers ◽

RH Norris

Keyword(s):

Water Temperature ◽

Northern Hemisphere ◽

Membrane Filtration ◽

Linear Regression Analysis ◽

Late Summer ◽

Multiple Linear Regression Analysis ◽

Aquatic Hyphomycetes ◽

Individual Species ◽

Minimum Concentration ◽

Summer Minimum

The aquatic hyphomycete spora of an upland stream (Lees Creek) were sampled twice monthly by membrane filtration at two sites, the upstream one with native riparian vegetation and the downstream one with exotic pines. Physicochemical properties of the water were measured at each sampling. Conidia of 43 species were collected, of which 18 are undescribed and most species occurred at both sites. The peak concentrations of conidia occurred in late summer to early autumn and minimum concentration in winter. This contrasts with the autumn-winter maximum and summer minimum concentrations recorded for tree-lined streams of the Northern Hemisphere. These differences correspond with differences in seasonality of litter fall in the Northern Hemisphere compared with Australia. Analysis of variance showed significant differences between the two sites for concentrations of conidia of individual species and of total conidia. The magnitude of these differences was related to the time of sampling. Using multiple linear regression analysis, the occurrences of conidia detected at the up-stream site were best explained by water temperature; down-stream, rainfall and water temperature together explained most variance.

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Temperature, length of growth season and phytoplankton abundance in the Gulf of Maine

Marine and Freshwater Research ◽

10.1071/mf14034 ◽

2015 ◽

Vol 66 (9) ◽

pp. 759 ◽

Cited By ~ 2

Author(s):

Knut Seip

Keyword(s):

Gulf Of Maine ◽

Late Summer ◽

Phytoplankton Abundance ◽

Annual Average ◽

Growth Season ◽

Chl A ◽

Phytoplankton Concentration ◽

Average Temperature ◽

Increasing Temperature

I show that the relation between annual average phytoplankton concentration (mg Chl-a m–3) and in situ sea surface temperature (SST) is positive (Chl-a=~0.5×SST, r=0.8, P<0.001) at an average temperature of 11°C (range 10–12°C) in the Gulf of Maine. However, within-seasonal observations (for 2005–09) were predominantly negatively associated. For the first relationship that describes annual averages, the extension of the growth season with increasing temperature may be an important factor. I show that an increase of 1°C starts the growing season 8 days earlier and lengthens the season by 13 days (for temperature >10°C). Tentative calculations suggest that the increased length matches the increase in annual phytoplankton concentration. For the second relationship that describes within-seasonal relationships, I suggest that warmer water during late summer increases stratification and limits nutrient supply to the upper productive layer.

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STRUKTURKOMUNITAS PLANKTONDANKONDISI LINGKUNGAN PERAIRANDITELUKJAKARTA

BAWAL Widya Riset Perikanan Tangkap ◽

10.15578/bawal.5.3.2013.131-150 ◽

2016 ◽

Vol 5 (3) ◽

pp. 131

Author(s):

Adriani Sri Nastiti ◽

Sri Turni Hartati

Keyword(s):

Water Temperature ◽

Fish Growth ◽

Natural Food ◽

Aquatic Environments ◽

Zooplankton Abundance ◽

Phytoplankton Abundance ◽

Biological Index ◽

Environmental Pressures ◽

Marine Life ◽

Fish Resources

Fitoplankton dan zooplankton merupakan pakan alami bagi biota laut termasuk ikan. Tujuan penelitian adalah mengetahui struktur komunitas fitoplankton dan zooplankton serta kondisi lingkungan perairan di Teluk Jakarta. Penelitian dilakukan pada bulan April, Juni, Agustus dan Oktober 2009, pengamatan di 5 stasiun TJ1, TJ2, TJ3, TJ4 dan TJ5. Parameter yang di ukur adalah: kelimpahan fitoplankton dan zooplankton, suhu air, kecerahan, oksigen terlarut, pH, salinitas,. Hasil penelitian menunjukkan bahwa fitoplankton yang ditemukan 5 kelas meliputi: Cyanophyceae (6 spesies), Chlorophyceae (4 spesies), Bacillariophyceae (37 spesies), Dinophyceae (14 spesies) dan Euglenophyceae (1 species). Zooplankton yang ditemukan 10 kelas meliputi : Crustacea (16 spesies), Holothuroidea (3 spesies), Ciliata (5 spesies), Sagittoidea (2 spesies), Sarcodina (3 spesies), Rotatoria (4 spesies), Echinodermata (1 spesies), Polychaeta (1 spesies), Urochordata (1 spesies) dan Hydrozoa (1 spesies). Kelimpahan fitoplankton berkisar antara 1.587.086 - 3.799.799 sel/l. Kelimpahan zooplankton berkisar antara 922.010 - 3.834.261ind/l. Indeks keanekaragaman (=H) fitoplankton berkisar antara 1,74 – 3,64;indeks dominansi (=D) berkisar antara 0,04-0,40 dan indeks keseragaman (=E) berkisar antara 0,08-0,34. Indeks biologi zooplankton menunjukkan nilai (=H) berkisar antara 0,22-3,70; nilai (=D) berkisar antara 0,18-0,79; dan nilai (=E) berkisar antara 0,01-0,37. Suhu air berkisar antara 29,5-31,6oC, pH berkisar antara 4,96-7,38 dan salinitas berkisar antara 12,0-31,5 o/oo. Teluk Jakarta diindikasikan mengalami tekanan lingkungan sehingga hanya beberapa spesies plankton mampu beradaptasi, yaitu dari kelas Bacillariophyceae (Chaetoceros sp) dan Crustaceae (Calanus sp dan Acartia sp). Phytoplankton and zooplankton is a natural food for other marine life including fish. Growth and development are supported by condition of aquatic environment. The research objective was to determine the community structure of phytoplankton and zooplankton and aquatic environments as a factor in supporting the management of fish resources in the Jakarta Bay. The research was conducted in April, June, August and October 2009 at five stations were : TJ1, TJ2, TJ3, TJ4 and J5 . The parameters measured were: phytoplankton and zooplankton abundance, water temperature, brightness, dissolved oxygen, pH and salinity,. The results show that there were 5 classes of phytoplankton found in Jakarta Bay consisting of: Cyanophyceae (6 species), Chlorophyceae (4 species), Bacillariophyceae (37 species), Dinophyceae (14 species)and Euglenophyceae (1 species). Zooplankton were found 10 classes consisting of Crustacea (16 species), Holothuroidea (3 species), Ciliata (5 species), Sagittoidea (2 species), Sarcodina (3 species), Rotatoria (4 species), Echinodermata (1 species), Polychaeta (1 species), Urochordata (1 species) dan Hydrozoa (1 species). Phytoplankton abundance was between 1.922.010 - 3.834.261 cell/ l. Zooplankton abundance was between 2.764 - 2.849.066 ind/l. Analysis on biological index of phytoplankton showed that the diversity indeces ranged between 1,74 – 3,64; dominance indeces (=D) ranged between 0,04-0,40 and similarity indeces (=E) ranged between 0,08- 0,34. Biological index of zooplankton showed that the diversity indeces (= H) ranged between 0,22-3,70; dominance indeces (=D) ranged between 0,18-0,79, and similarity indeces (= E) ranged between 0,01-0,37. Water temperature ranged between 29.5 - 31.6o C, pH ranged between 4.96 - 7.38 and salinity ranged between 12.0 - 31.5 o / oo . Jakarta Bay is experienced environmental pressures so that only several species plankton are capable of adapting, that is from class Bacillariophyceae (Chaetoceros sp.) and class Crustaceae (Calanus sp. and Acartia sp).

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Deep water temperature variation of Lake Baikal during 1972–2007

Geography and Natural Resources ◽

10.1016/j.gnr.2009.09.010 ◽

2009 ◽

Vol 30 (3) ◽

pp. 258-264 ◽

Cited By ~ 2

Author(s):

M.N. Shimarayev ◽

E.S. Troitskaya ◽

R.Yu. Gnatovsky

Keyword(s):

Water Temperature ◽

Temperature Variation ◽

Lake Baikal ◽

Deep Water

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The biology of Harveyella mirabilis (Cryptonemiales, Rhodophyceae). IV. Life history and phenology

Canadian Journal of Botany ◽

10.1139/b76-026 ◽

1976 ◽

Vol 54 (3-4) ◽

pp. 281-292 ◽

Cited By ~ 9

Author(s):

Lynda J. Goff ◽

Kathleen Cole

Keyword(s):

Water Temperature ◽

Seawater Temperature ◽

Environmental Parameters ◽

Late Summer ◽

Early Spring ◽

Day Length ◽

Late Winter ◽

Temperature Sensitive ◽

The North ◽

The North Pacific

A 20-month field study of the reproductive biology of the parasitic red alga Harveyella mirabilis was undertaken to investigate the effects of environmental parameters on the reproductive periodicity of Harveyella in the intertidal habitat. In the northeast Pacific, tetraspores have been observed in the late winter - early spring; apparently they are produced in response to increased available sunlight and water temperature. Gametogenesis appears to be temperature sensitive; it occurs between a narrow temperature range (9–11 °C). Carpospores are produced in the late summer when both water temperature and day length reach a peak. The phenology of H. mirabilis in the North Atlantic differs from that which is observed in the North Pacific in the timing of gametogenesis and carposporogenesis. The significance of this is discussed in relation to the possible effects of differences in seawater temperature on gametogenesis.

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The ecology of Honey Creek, Oklahoma: population dynamics and drifting behavior of three species of Simulium (Diptera: Simuliidae)

Canadian Journal of Zoology ◽

10.1139/z77-044 ◽

1977 ◽

Vol 55 (2) ◽

pp. 325-337 ◽

Cited By ~ 13

Author(s):

William K. Reisen

Keyword(s):

Population Dynamics ◽

Water Temperature ◽

Larval Development ◽

Late Summer ◽

Diel Changes ◽

Egg Maturation ◽

South Central ◽

Early Fall

The population dynamics and drifting behavior of Simulium virgatum, S. trivittatum, and Simulium species A were investigated at nine stations in a south-central Oklahoma limestone stream from June 1972 through August 1973. Simulium species A abundance paralleled vernal periphyton increases and exhibited characteristic midsummer and midwinter decreases, while S. virgatum and S. trivittatum were most prevalent during late summer and early fall. Simulium species A and S. virgatum oviposited during the evening crepuscular period. In Simulium species A synchronous egg maturation and eclosion apparently imparted a degree of drift rhythmicity in the early instars which progressively degenerated during larval development. Simulium virgatum drift rates were highest during midafternoon and were correlated with diel changes in water temperature. Simulium trivittatum drift rates were highest during the evening and morning and lowest during the afternoon.

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Vertical Distribution of Phytoplankton Community and Pigment Production in the Yellow Sea and the East China Sea during the Late Summer Season

Water ◽

10.3390/w13233321 ◽

2021 ◽

Vol 13 (23) ◽

pp. 3321

Author(s):

Jae-Joong Kang ◽

Jun-Oh Min ◽

Yejin Kim ◽

Chang-Hwa Lee ◽

Hyeju Yoo ◽

...

Keyword(s):

Climate Change ◽

Vertical Distribution ◽

Water Temperature ◽

East China Sea ◽

Yellow Sea ◽

Phytoplankton Community ◽

Late Summer ◽

Summer Season ◽

Pigment Production ◽

The Yellow Sea

Phytoplankton community structure, which plays an important role in determining productivity and food web structure, can provide important information for understanding variations in marine ecosystems under projected climate change scenarios. Rising temperatures due to climate change will increase and intensify water stratification. To understand the community composition and distribution characteristics of phytoplankton under stratified conditions, phytoplankton pigments were analyzed in the Yellow Sea (YS) and East China Sea (ECS) during the late summer season. In addition, pigment production was measured to estimate the physiological characteristics of phytoplankton relating to light, which is an essential element of photosynthesis. During our observation period, no distinct differences were found in the community composition and pigment production of phytoplankton in the YS and the ECS, but differences in the vertical distribution were observed. Overall, the dominant phytoplankton classes at the surface depth were pico-sized cyanobacteria (46.1%), whereas micro- and nano-sized diatoms (42.9%) were the abundant most classes at a 1% light depth. The major factors controlling the vertical distributions of the phytoplankton community were temperature and nutrients (i.e., nitrate and ammonium). Cyanobacteria were positively correlated with water temperature and ammonium, whereas diatoms were negatively related to water temperature and positively correlated with nitrates. Based on the pigment production, it was found that cyanobacteria at the surface layer encountered excessive irradiance conditions during the study period. The productivity of the cyanobacterial community could be decreased under high-light and high-temperature conditions. This means that cyanobacteria could have a negative influence on the quantity and quality of food available to upper trophic organisms under warmer conditions.

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