❓ A Western Australian parliamentary question seeks data on algal blooms in the Swan-Canning River system from 1993-2001, including type, location, and cause. The response provides detailed information on bloom frequency, algal composition, location within the river systems, and the environmental factors contributing to these blooms.
AnsweredQoN 91Legislative Council
QuestionView source ↗
(1) How many algal blooms or outbreaks have occurred in the Swan-Canning River system for each year from 1993?
(2) For each algal bloom -
(a) what type of algae was it;
(b) what was the location of the algal bloom; and
(c) what was the identified cause of the algal bloom?
(2) For each algal bloom -
(a) what type of algae was it;
(b) what was the location of the algal bloom; and
(c) what was the identified cause of the algal bloom?
AnswerView source ↗
Answered
31 July 2001
Responded by
Minister for Housing representing the Minister for Water Resources
Response time
40 days
(b) what was the location of the algal bloom; and (c) what was the identified cause of the algal bloom?
(c) what was the identified cause of the algal bloom?
Swan River estuary 166 Canning River and estuary 102 2 a) The blooms were comprised of the main categories Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
2 a) The blooms were comprised of the main categories Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
* From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
(c) what was the identified cause of the algal bloom?
Swan River estuary 166 Canning River and estuary 102 2 a) The blooms were comprised of the main categories Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
2 a) The blooms were comprised of the main categories Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Over all years the main groups were: Chorophyte (harmless green) or Estuarine Diatoms - 79% of Swan., 72 % of Canning. Dinoflagellates and other nuisance species - 19% of Swan, 13 % of Canning. Cyanobacteria (blue-greens) - 2% of Swan (Feb 2000), 15 % of Canning. b) Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Location *1994 1995 1996 1997 1998 1999 2000 **2001 Total Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Swan below Narrows 0 1 5 6 2 3 14 0 31 Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Swan above Narrows 6 17 11 7 24 8 25 37 135 Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Canning below Kent St Weir No Data 0 2 4 18 7 10 15 56 Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Canning above Kent St Weir 8 0 0 7 14 4 4 9 46 Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Total 14 18 18 24 58 22 53 61 268 * From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
* From July 1994 ** From Jan to Jun 2001 c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
c) Chorophyte and green algae are part of the natural cycle and respond to winter, spring and sometimes autumn rains. Estuarine diatoms appear in response to salt water movement from the ocean in late spring and early summer. Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Flagellates and dinoflagellates respond to the warm summer temperatures and derive their nutrients from the sediments Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
Cyanobacteria (blue-greens) respond to warm still conditions and high nutrient concentrations.
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