The concept of stability in connection with the gallery forests of the Chaco region
This paper discusses the concept of stability in a concrete natural situation: the gallery forests in the Chaco region. On the basis of Pickett's definition of minimal structure, stability is considered as the response which enables a system to keep its (minimal and configurational) structure o...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00423106_v94_n1_p1_Sennhauser |
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todo:paper_00423106_v94_n1_p1_Sennhauser2023-10-03T14:51:23Z The concept of stability in connection with the gallery forests of the Chaco region Sennhauser, E.B. Chaco Gallery forest dynamics Resilience River dynamic Stability gallery forest resilience stability Argentina, Chaco, Lower Bermejo Basin This paper discusses the concept of stability in a concrete natural situation: the gallery forests in the Chaco region. On the basis of Pickett's definition of minimal structure, stability is considered as the response which enables a system to keep its (minimal and configurational) structure once an alteration has taken place (Pickett et al. 1989). Resilience is, instead, another kind of response which enables the system to keep its minimal structure intact regardless of what might happen to its configurational structure. The system to be analysed is that of the gallery forests in the Lower Bermejo Basin, in Argentina, which is subject to intense river bed migrations and floods caused by this allochthonous watercourse. The effect of this alteration is analysed on different space-time scales. Locally floods behave as a completely unpredictable phenomena, starting a complex floristic changes mechanism that would eventually enable the system to recover its structure once the alteration is over. These forests appear to be resilient but little adaptable, with low resistence and low elasticity. The latter, when combined with the alternation's return interval, which is under the ecosystem's generation time, upset the theoretical stability conditions, thus making the system seem 'apparently unstable'. Regionally, instead, migrations act as regular and permanent phenomena (highly predictable) always affecting some part of the area. The autochthonous system river side forests have become adapted through evolution to this new situation, so much so that this phenomenon has become a part of the system's internal dynamics. Chaco physiognomy, were it not due to the allochthonous phenomena affecting it today, would certainly be very different from the present one. © 1991 Kluwer Academic Publishers. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00423106_v94_n1_p1_Sennhauser |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Chaco Gallery forest dynamics Resilience River dynamic Stability gallery forest resilience stability Argentina, Chaco, Lower Bermejo Basin |
| spellingShingle |
Chaco Gallery forest dynamics Resilience River dynamic Stability gallery forest resilience stability Argentina, Chaco, Lower Bermejo Basin Sennhauser, E.B. The concept of stability in connection with the gallery forests of the Chaco region |
| topic_facet |
Chaco Gallery forest dynamics Resilience River dynamic Stability gallery forest resilience stability Argentina, Chaco, Lower Bermejo Basin |
| description |
This paper discusses the concept of stability in a concrete natural situation: the gallery forests in the Chaco region. On the basis of Pickett's definition of minimal structure, stability is considered as the response which enables a system to keep its (minimal and configurational) structure once an alteration has taken place (Pickett et al. 1989). Resilience is, instead, another kind of response which enables the system to keep its minimal structure intact regardless of what might happen to its configurational structure. The system to be analysed is that of the gallery forests in the Lower Bermejo Basin, in Argentina, which is subject to intense river bed migrations and floods caused by this allochthonous watercourse. The effect of this alteration is analysed on different space-time scales. Locally floods behave as a completely unpredictable phenomena, starting a complex floristic changes mechanism that would eventually enable the system to recover its structure once the alteration is over. These forests appear to be resilient but little adaptable, with low resistence and low elasticity. The latter, when combined with the alternation's return interval, which is under the ecosystem's generation time, upset the theoretical stability conditions, thus making the system seem 'apparently unstable'. Regionally, instead, migrations act as regular and permanent phenomena (highly predictable) always affecting some part of the area. The autochthonous system river side forests have become adapted through evolution to this new situation, so much so that this phenomenon has become a part of the system's internal dynamics. Chaco physiognomy, were it not due to the allochthonous phenomena affecting it today, would certainly be very different from the present one. © 1991 Kluwer Academic Publishers. |
| format |
JOUR |
| author |
Sennhauser, E.B. |
| author_facet |
Sennhauser, E.B. |
| author_sort |
Sennhauser, E.B. |
| title |
The concept of stability in connection with the gallery forests of the Chaco region |
| title_short |
The concept of stability in connection with the gallery forests of the Chaco region |
| title_full |
The concept of stability in connection with the gallery forests of the Chaco region |
| title_fullStr |
The concept of stability in connection with the gallery forests of the Chaco region |
| title_full_unstemmed |
The concept of stability in connection with the gallery forests of the Chaco region |
| title_sort |
concept of stability in connection with the gallery forests of the chaco region |
| url |
http://hdl.handle.net/20.500.12110/paper_00423106_v94_n1_p1_Sennhauser |
| work_keys_str_mv |
AT sennhausereb theconceptofstabilityinconnectionwiththegalleryforestsofthechacoregion AT sennhausereb conceptofstabilityinconnectionwiththegalleryforestsofthechacoregion |
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