Ecology

Habitat

Depth range based on 19 specimens in 20 taxa.
Water temperature and chemistry ranges based on 4 samples.

Environmental ranges
  Depth range (m): 0 - 200
  Temperature range (°C): -1.178 - 5.196
  Nitrate (umol/L): 0.756 - 22.800
  Salinity (PPS): 28.209 - 34.788
  Oxygen (ml/l): 7.302 - 8.703
  Phosphate (umol/l): 0.211 - 1.246
  Silicate (umol/l): 2.514 - 21.227

Graphical representation

Depth range (m): 0 - 200

Temperature range (°C): -1.178 - 5.196

Nitrate (umol/L): 0.756 - 22.800

Salinity (PPS): 28.209 - 34.788

Oxygen (ml/l): 7.302 - 8.703

Phosphate (umol/l): 0.211 - 1.246

Silicate (umol/l): 2.514 - 21.227
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Associations

Known predators

Pinnularia (Pinnularia sp. (large)) is prey of:
Lumbriculidae blue
Cambaridae
Aphrophila noevaezelandiae
Austrosimulium australense
Coloburiscus humeralis
Deleatidium
Helicopsyche albescens
Hudsonema amabilis
Oligochaeta I
Oligochaeta II
Olinga feredayii
Bivalvia
Philorheithrus agilis
Potamopyrgus antipodarum
Austroperla cyrene
Orthocladiinae
Eukiefferiella
Podonomus
Polypedellum
Tanytarsini
Hudsonema aliena
Hydora nitida
Oligochaeta type weak-long-short
Pycnocentrodes evecta
Aoteapsyche
Austroclima jollyae
Cricotopus II
Maoridiamesea
Oniscigaster
Oxyethira albiceps
Paranephrops zealandicus
Potamopurgus antipodarum
Chironomid type Polyped
Nesameletus ornatus
Pycnocentrodes
Baraeoptera roria
Eriopterini
Podaena
Scirtidae
Tanyderidae
Zelandoperla
Zephlebia spectabilis
Pirara
Tanytarsini II
Austraclima jollyae
Tanytarsini I
Hydrobiosella
Molophilus
Amphipoda
Orchymontia
Pycnocentria
Zelandotipula
Olinga feredayi

Based on studies in:
New Zealand: Otago, Akatore, Akatore catchment (River)
New Zealand: Otago, Blackrock, Lee catchment (River)
New Zealand: Otago, Broad, Lee catchment (River)
New Zealand: South Island, Canton Creek, Taieri River, Lee catchment (River)
New Zealand: Otago, Dempster's Stream, Taieri River, 3 O'Clock catchment (River)
New Zealand: Otago, Healy Stream, Taieri River, Kye Burn catchment (River)
New Zealand: Otago, Kye Burn (River)
New Zealand: Otago, Little Kye, Kye Burn catchment (River)
New Zealand: Otago, Stony, Sutton catchment (River)
New Zealand: Otago, Sutton Stream, Taieri River, Sutton catchment (River)
New Zealand: Otago, German, Kye Burn catchment (River)

This list may not be complete but is based on published studies.
  • Thompson, RM and Townsend CR. 2005. Energy availability, spatial heterogeneity and ecosystem size predict food-web structure in streams. OIKOS 108: 137-148.
  • Townsend, CR, Thompson, RM, McIntosh, AR, Kilroy, C, Edwards, ED, Scarsbrook, MR. 1998. Disturbance, resource supply and food-web architecture in streams. Ecology Letters 1:200-209.
  • Thompson, RM and Townsend, CR. 1999. The effect of seasonal variation on the community structure and food-web attributes of two streams: implications for food-web science. Oikos 87: 75-88.
Creative Commons Attribution 3.0 (CC BY 3.0)

© SPIRE project

Source: SPIRE

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage

Barcode of Life Data Systems (BOLD) Stats
Specimen Records: 72
Specimens with Sequences: 119
Species: 17
Species With Barcodes: 15
Public Records: 17
Public Species: 13
Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Barcode data

Creative Commons Attribution 3.0 (CC BY 3.0)

© Barcode of Life Data Systems

Source: Barcode of Life Data Systems (BOLD)

Trusted

Article rating from 0 people

Default rating: 2.5 of 5

Wikipedia

Pinnularia


Pinnularia is a fresh water alga more specifically a type of Bacillariophyta (diatom).

Contents

Habitat

Pinnularia is a predominantly fresh-water alga, usually found in ponds and moist soil. They can also be found in springs, estuaries, sediments, and oceans. Members of this genus are most commonly found in 40cm (1¼ ft) of water, at 5°C (40 °F).

External structure

Pinnularia are elongated elliptical unicellular organisms. Their cell walls are composed chiefly of pectic substances on a rigid silica framework. Their walls are composed of two halves called thecae (or less formally, valves.) These halves overlap like a petri dish and its cover. The margins of the two thecae are covered by a connecting band called a cingulum and all together are referred to as a frustule. the surface view is called valve view and band view is called girdle view. the outer larger valve is called Epitheca.and the smaller inner valve is called hypotheca.the cell is covered by mucilaginous layer.

Internal structure

The cytoplasm is arranged approximately in layers conforming to the shape of the cell's walls. A large central vacuole is present with the nucleus suspended in its centre by a transverse cytoplasmic bridge. Two chloroplasts are present along the sides of the cells, and contain chlorophyll a, c, beta-carotene and fucoxanthin pigments. One or two pyrenoids are usually present in each chloroplast, although like many heterokont algae Pinularia tend to store their energy as fat. The cytoplasm also contains chrysolaminarin and some volutin.

Reproduction

Pinnularia Teilung.jpg

Pinnularia like most diatoms, can reproduce by simple cell division. Nuclear division occurs by mitosis and cell divides into two parts. Each daughter receives one of the parent cell's thecae, which becomes that cell's epitheca. The cell then synthesizes a new hypotheca. Thus one daughter is the same size as the parent, and one is slightly smaller. With subsequent generations the average cell size of a Pinnularia population gradually becomes smaller. When a minimum average size is reached auxospore formation occurs and sexual reproduction restores the population's average cell size.

References

Creative Commons Attribution Share Alike 3.0 (CC BY-SA 3.0)

Source: Wikipedia

Unreviewed

Article rating from 0 people

Default rating: 2.5 of 5

Disclaimer

EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!