Experimental demonstration of a trophic cascade in the Galápagos rocky subtidal : (Registro nro. 13016)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02783nab a22002897a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | EC-PaCDF |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20201229114720.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 170717t20172017xxu|||||||||||||||||eng|| |
| 040 ## - CATALOGING SOURCE | |
| Original cataloging agency | EC-PaCDF |
| Language of cataloging | spa |
| Transcribing agency | EC-PaCDF |
| 041 ## - LANGUAGE CODE | |
| Language code of text/sound track or separate title | eng |
| 082 04 - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Edition number | 23 |
| Classification number | 577.16 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Witman, Jon D. |
| 9 (RLIN) | 1578 |
| Relator term | autor |
| 245 10 - TITLE STATEMENT | |
| Title | Experimental demonstration of a trophic cascade in the Galápagos rocky subtidal : |
| Remainder of title | Effects of consumer identity and behavior / |
| Statement of responsibility, etc. | Jon D. Witman, Franz Smith and Mark Novak. |
| 260 3# - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Date of publication, distribution, etc. | 2017. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | : 1-23 p. |
| 520 0# - SUMMARY, ETC. | |
| Summary, etc. | In diverse tropical webs, trophic cascades are presumed to be rare, as species interactions may dampen top-down control and reduce their prevalence. To test this hypothesis, we used an open experimental design in the Galápagos rocky subtidal that enabled a diverse guild of fish species, in the presence of each other and top predators (sea lions and sharks), to attack two species of sea urchins grazing on benthic algae. Time-lapse photography of experiments on natural and experimental substrates revealed strong species identity effects: only two predator species–blunthead triggerfish (Pseudobalistes naufragium) and finescale triggerfish (Balistes polylepis)–drove a diurnal trophic cascade extending to algae, and they preferred large pencil urchins (Eucidaris galapagensis) over green urchins (Lytechinus semituberculatus). Triggerfish predation effects were strong, causing a 24-fold reduction of pencil urchin densities during the initial 21 hours of a trophic cascade experiment. A trophic cascade was demonstrated for pencil urchins, but not for green urchins, by significantly higher percent cover of urchin-grazed algae in cages that excluded predatory fish than in predator access (fence) treatments. Pencil urchins were more abundant at night when triggerfish were absent, suggesting that this species persists by exploiting a nocturnal predation refuge. Time-series of pencil urchin survivorship further demonstrated per capita interference effects of hogfish and top predators. These interference effects respectively weakened and extended the trophic cascade to a fourth trophic level through behavioral modifications of the triggerfish-urchin interaction. We conclude that interference behaviors capable of modifying interaction strength warrant greater attention as mechanisms for altering top-down control, particularly in speciose food webs. |
| 546 ## - LANGUAGE NOTE | |
| Language note | Inglés |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Trophic cascade |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Cascada trófica |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Rocky |
| 653 ## - INDEX TERM--UNCONTROLLED | |
| Uncontrolled term | Rocoso |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Smith, Franz. |
| 9 (RLIN) | 5533 |
| Relator term | autor |
| 710 ## - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Novak, Mark. |
| Relator term | autor |
| 773 0# - HOST ITEM ENTRY | |
| Related parts | Vol. 12, No. 4 (April 2017), p. 1-23. |
| Title | PLOS ONE |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | https://dx.doi.org/10.1371/journal.pone.0175705 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Koha item type | Artículo |
| Withdrawn status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Total Checkouts | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Artículos | 17/07/2017 | 577.16 WIT 2017 | 2020-0852 | 17/07/2017 | 17/07/2017 | Artículo | ||||
| Dewey Decimal Classification | Galápagos | Corley Smith Library | Corley Smith Library | Colección PDF | 17/07/2017 | 577.16 WIT 2017 | 2021-1368 | 17/07/2017 | 17/07/2017 | Documento electrónico |