Centro de Modelación y Monitoreo de Ecosistemas (CEM)Contiene la producción documental (impresa y audiovisual) del CEMhttps://repositorio.umayor.cl/xmlui/handle/sibum/80452024-03-29T10:17:05Z2024-03-29T10:17:05ZEditorial: Impacts of climate change on long term viability of tree species with recalcitrant seedsBrock, JMR.Craven, Dylan [Univ Mayor, Ctr Modelac & Monitoreo Ecosistemas, Chile]Morales, Narkis S.https://repositorio.umayor.cl/xmlui/handle/sibum/95112024-03-25T21:47:49Z2023-08-07T00:00:00ZEditorial: Impacts of climate change on long term viability of tree species with recalcitrant seeds
Brock, JMR.; Craven, Dylan [Univ Mayor, Ctr Modelac & Monitoreo Ecosistemas, Chile]; Morales, Narkis S.
Sin resumen.
2023-08-07T00:00:00ZMonitoreo permanente de bosques naturales en las áreas silvestres protegidas de Chile: una necesidad urgenteSalas-Eljatib, Christian [Universidad Mayor, Escuela de Ingeniería Forestal, Centro de Modelación y Monitoreo de Ecosistemas, Chile]Vargas-Gaete, RodrigoSoto, Daniel P.Donoso, Pablo J.https://repositorio.umayor.cl/xmlui/handle/sibum/94502024-02-24T17:32:25Z2023-04-01T00:00:00ZMonitoreo permanente de bosques naturales en las áreas silvestres protegidas de Chile: una necesidad urgente
Salas-Eljatib, Christian [Universidad Mayor, Escuela de Ingeniería Forestal, Centro de Modelación y Monitoreo de Ecosistemas, Chile]; Vargas-Gaete, Rodrigo; Soto, Daniel P.; Donoso, Pablo J.
La dinámica de los bosques se refiere al cambio en su estructura y composición en el tiempo, gobernado por su crecimiento, el cual es resultado de los procesos de incremento en tamaño, mortalidad de árboles y reclutamiento de nuevos individuos. Conocer el crecimiento de un bosque es esencial para la toma de decisiones de manejo y en investigación. Una apropiada caracterización del crecimiento de los bosques sólo es posible mediante la remedición de unidades de muestreo permanente en el tiempo. Aunque Chile tiene un sistema de inventario continuo, este posee una serie de deficiencias para el estudio efectivo del crecimiento de bosques; ya que posee un enfoque a nivel de rodal, pero no a nivel individual, y el acceso a los datos crudos es escaso. Por otro lado, los esfuerzos científicos son complejos de mantener en el largo plazo debido a las restricciones presupuestarias. Todo lo anterior configura un escenario adverso para proveer información clave y necesaria respecto al crecimiento de los ecosistemas forestales nativos. En el presente trabajo se propone el establecimiento de una red de unidades de muestreo permanente en bosques del Sistema Nacional de Áreas Silvestres Protegidas del Estado de Chile. Finalmente, se discute un sistema de monitoreo basado en esta red, destacando las ventajas en términos de investigación, difusión y extensión, así como la facilidad que ofrece para agregar atributos no arbóreos.
2023-04-01T00:00:00ZLoss of native herbivores triggers diversity decline of ephemeral plant communitiesFernández-Murillo, María del PilarAlfaro, Fernando DanielCraven, Dylan [Univ Mayor, Fac Ciencias, Ctr Modelac & Monitoreo Ecosistemas, Chile]Gutiérrez, Julio RobertoKelt, Douglas A.Meserve, Peter L.Troncoso, Alejandra J.https://repositorio.umayor.cl/xmlui/handle/sibum/94402024-02-19T22:39:11Z2023-09-01T00:00:00ZLoss of native herbivores triggers diversity decline of ephemeral plant communities
Fernández-Murillo, María del Pilar; Alfaro, Fernando Daniel; Craven, Dylan [Univ Mayor, Fac Ciencias, Ctr Modelac & Monitoreo Ecosistemas, Chile]; Gutiérrez, Julio Roberto; Kelt, Douglas A.; Meserve, Peter L.; Troncoso, Alejandra J.
Aim: Evaluate the temporal changes in species diversity, composition, and structure of ephemeral plant communities and the seed bank in response to long-term herbivore exclusion over 11 years in plots with and without herbivores.LocationNorth-central Chile.Methods: We obtained information on ephemeral vegetation cover in August and September using the intercept point method and recorded seed abundance in April. The Bosque Fray Jorge National Park Long-Term Socio-Ecological Research (LTSER) provided these records covering 11 years (2009-2019). From the original experiment of 20 plots, we used eight plots divided into two treatments: four plots allowed free access to all herbivores (with herbivores), while the other four plots excluded herbivores (without herbivores).Results: We found that Hill-Shannon diversity increased in plant communities with herbivores and a temporal increase in the cover of the dominant species, Plantago hispidula, under herbivore exclusion. In wet years, species richness and temporal turnover of plant communities increased independently of treatment. Although seed abundance differed among treatments and years, population structure remained constant over time and among treatments, suggesting that the seed bank acts as a buffer against shocks that modify plant community dynamics. Structural equation modeling revealed that precipitation, via its positive effects on Plantago hispidula, increases native plant richness to a greater extent than herbivores. However, in the absence of herbivores, precipitation directly affects native species richness. Moreover, we found that precipitation also influences the native species richness of the seed bank, both directly and indirectly, although its impacts exhibit a time lag.Conclusions: Our study demonstrates that the temporal dynamics of ephemeral plant communities and seed banks in semi-arid ecosystems are strongly coupled to climate variability, highlighting the vulnerability of these communities to biodiversity loss and climate change.
2023-09-01T00:00:00ZEvenness mediates the global relationship between forest productivity and richnessSalas-Eljatib, Christian [Univ Mayor, Ctr Modelac & Monitoreo Ecosistemas, Chile]Hordijk, I; Maynard, DS; Hart, SP; Mo, LD; ter Steege, H; Liang, JJ; de-Miguel, S; Nabuurs, GJ; Reich, PB ; Abegg, M; Yao, CYA; Alberti, G; Zambrano, AAM; Alvarado, BV; Esteban, AD; Alvarez-Loayza, P; Alves, LF; Ammer, C; Antón-Fernández, C; Araujo-Murakami, A; Arroyo, L; Avitabile, V; Aymard, GA; Baker, T; Balazy, R; Banki, O; Barroso, J; Bastian, ML; Bastin, JF; Birigazzi, L; Birnbaum, P; Bitariho, R; Boeckx, P; Bongers, F; Bouriaud, O; Brancalion, PHS; Brandl, S; Brienen, R; Broadbent, EN; Bruelheide, H; Bussotti, F; Gatti, RC; César, RG; Cesljar, G; Chazdon, R; Chen, HYH; Chisholm, C; Cienciala, E; Clark, CJ; Clark, DB; Colletta, G; Coomes, D; Valverde, FC; Corral-Rivas, JJ; Crim, P; Cumming, J; Dayanandan, S; de Gasper, AL; Decuyper, M; Derroire, G; DeVries, B; Djordjevic, I; Iêda, A; Dourdain, A; Laurier, EON; Enquist, B; Eyre, T; Fandohan, AB; Fayle, TM; Ferreira, LV; Feldpausch, TR; Finér, L; Fischer, M; Fletcher, C; Frizzera, L; Gamarra, JGP; Gianelle, D; Glick, HB; Harris, D; Hector, A; Hemp, A; Hengeveld, G; Hérault, B; Herbohn, J; Hillers, A; Coronado, ENH; Hui, C; Cho, H; Ibanez, T; Jung, IB; Imai, N; Jagodzinski, AM; Jaroszewicz, B; Johanssen, V; Joly, CA; Jucker, T; Karminov, V; Kartawinata, K; Kearsley, E; Kenfack, D; Kennard, D; Kepfer-Rojas, S; Keppel, G; Khan, ML; Killeen, T; Kim, HS; Kitayama, K; Köhl, M; Korjus, H; Kraxner, F; Laarmann, D; Lang, M; Lewis, S; Lu, HC; Lukina, N; Maitner, B; Malhi, Y; Marcon, E; Marimon, BS; Marimon, B Jr; Marshall, AR; Martin, E; Martynenko, O; Meave, JA; Melo-Cruz, O; Mendoza, C; Merow, C; Stanislaw, M; Mendoza, AM; Moreno, V; Mukul, SA; Mundhenk, P; Nava-Miranda, MG; Neill, D; Neldner, V; Nevenic, R; Ngugi, M; Niklaus, PA; Oleksyn, J; Ontikov, P; Ortiz-Malavasi, E; Pan, YD; Paquette, A; Parada-Gutierrez, A; Parfenova, E; Park, M; Parren, M; Parthasarathy, N; Peri, PL; Pfautsch, S; Phillips, OL; Picard, N; Piedade, MT; Piotto, D; Pitman, NCA; Polo, I; Poorter, L; Poulsen, AD; Poulsen, JR; Pretzsch, H; Arevalo, FR; Restrepo-Correa, Z; Rodeghiero, M; Rolim, S; Roopsind, A; Rovero, F; Rutishauser, E; Saikia, P; Schall, P; Schepaschenko, D; Scherer-Lorenzen, M; Schmid, B; Schöngart, J; Searle, EB; Seben, V; Serra-Diaz, JM; Sheil, D; Shvidenko, A; Silva-Espejo, J; Silveira, M; Singh, J; Sist, P; Slik, F; Sonké, B; Souza, AF; Sterenczak, K; Svenning, JC; Svoboda, M; Swanepoel, B; Targhetta, N; Tchebakova, N; Thomas, R; Tikhonova, E; Umunay, P; Usoltsev, V; Valencia, R; Valladares, F; van der Plas, F; Tran, DV; Van Nuland, ME; Martinez, RV; Verbeeck, H; Viana, H; Vibrans, AC; Vieira, S; von Gadow, K; Wang, HF; Watson, J; Werner, GDA; Wiser, SK; Wittmann, F; Wortel, V; Zagt, R; Zawila-Niedzwiecki, T; Zhang, CY; Zhao, XH; Zhou, M; Zhu, ZX; Zo-Bi, IC; Crowther, TWhttps://repositorio.umayor.cl/xmlui/handle/sibum/94352024-02-19T19:03:42Z2023-06-01T00:00:00ZEvenness mediates the global relationship between forest productivity and richness
Salas-Eljatib, Christian [Univ Mayor, Ctr Modelac & Monitoreo Ecosistemas, Chile]; Hordijk, I; Maynard, DS; Hart, SP; Mo, LD; ter Steege, H; Liang, JJ; de-Miguel, S; Nabuurs, GJ; Reich, PB ; Abegg, M; Yao, CYA; Alberti, G; Zambrano, AAM; Alvarado, BV; Esteban, AD; Alvarez-Loayza, P; Alves, LF; Ammer, C; Antón-Fernández, C; Araujo-Murakami, A; Arroyo, L; Avitabile, V; Aymard, GA; Baker, T; Balazy, R; Banki, O; Barroso, J; Bastian, ML; Bastin, JF; Birigazzi, L; Birnbaum, P; Bitariho, R; Boeckx, P; Bongers, F; Bouriaud, O; Brancalion, PHS; Brandl, S; Brienen, R; Broadbent, EN; Bruelheide, H; Bussotti, F; Gatti, RC; César, RG; Cesljar, G; Chazdon, R; Chen, HYH; Chisholm, C; Cienciala, E; Clark, CJ; Clark, DB; Colletta, G; Coomes, D; Valverde, FC; Corral-Rivas, JJ; Crim, P; Cumming, J; Dayanandan, S; de Gasper, AL; Decuyper, M; Derroire, G; DeVries, B; Djordjevic, I; Iêda, A; Dourdain, A; Laurier, EON; Enquist, B; Eyre, T; Fandohan, AB; Fayle, TM; Ferreira, LV; Feldpausch, TR; Finér, L; Fischer, M; Fletcher, C; Frizzera, L; Gamarra, JGP; Gianelle, D; Glick, HB; Harris, D; Hector, A; Hemp, A; Hengeveld, G; Hérault, B; Herbohn, J; Hillers, A; Coronado, ENH; Hui, C; Cho, H; Ibanez, T; Jung, IB; Imai, N; Jagodzinski, AM; Jaroszewicz, B; Johanssen, V; Joly, CA; Jucker, T; Karminov, V; Kartawinata, K; Kearsley, E; Kenfack, D; Kennard, D; Kepfer-Rojas, S; Keppel, G; Khan, ML; Killeen, T; Kim, HS; Kitayama, K; Köhl, M; Korjus, H; Kraxner, F; Laarmann, D; Lang, M; Lewis, S; Lu, HC; Lukina, N; Maitner, B; Malhi, Y; Marcon, E; Marimon, BS; Marimon, B Jr; Marshall, AR; Martin, E; Martynenko, O; Meave, JA; Melo-Cruz, O; Mendoza, C; Merow, C; Stanislaw, M; Mendoza, AM; Moreno, V; Mukul, SA; Mundhenk, P; Nava-Miranda, MG; Neill, D; Neldner, V; Nevenic, R; Ngugi, M; Niklaus, PA; Oleksyn, J; Ontikov, P; Ortiz-Malavasi, E; Pan, YD; Paquette, A; Parada-Gutierrez, A; Parfenova, E; Park, M; Parren, M; Parthasarathy, N; Peri, PL; Pfautsch, S; Phillips, OL; Picard, N; Piedade, MT; Piotto, D; Pitman, NCA; Polo, I; Poorter, L; Poulsen, AD; Poulsen, JR; Pretzsch, H; Arevalo, FR; Restrepo-Correa, Z; Rodeghiero, M; Rolim, S; Roopsind, A; Rovero, F; Rutishauser, E; Saikia, P; Schall, P; Schepaschenko, D; Scherer-Lorenzen, M; Schmid, B; Schöngart, J; Searle, EB; Seben, V; Serra-Diaz, JM; Sheil, D; Shvidenko, A; Silva-Espejo, J; Silveira, M; Singh, J; Sist, P; Slik, F; Sonké, B; Souza, AF; Sterenczak, K; Svenning, JC; Svoboda, M; Swanepoel, B; Targhetta, N; Tchebakova, N; Thomas, R; Tikhonova, E; Umunay, P; Usoltsev, V; Valencia, R; Valladares, F; van der Plas, F; Tran, DV; Van Nuland, ME; Martinez, RV; Verbeeck, H; Viana, H; Vibrans, AC; Vieira, S; von Gadow, K; Wang, HF; Watson, J; Werner, GDA; Wiser, SK; Wittmann, F; Wortel, V; Zagt, R; Zawila-Niedzwiecki, T; Zhang, CY; Zhao, XH; Zhou, M; Zhu, ZX; Zo-Bi, IC; Crowther, TW
Biodiversity is an important component of natural ecosystems, with higher species richness often correlating with an increase in ecosystem productivity. Yet, this relationship varies substantially across environments, typically becoming less pronounced at high levels of species richness. However, species richness alone cannot reflect all important properties of a community, including community evenness, which may mediate the relationship between biodiversity and productivity. If the evenness of a community correlates negatively with richness across forests globally, then a greater number of species may not always increase overall diversity and productivity of the system. Theoretical work and local empirical studies have shown that the effect of evenness on ecosystem functioning may be especially strong at high richness levels, yet the consistency of this remains untested at a global scale.2. Here, we used a dataset of forests from across the globe, which includes composition, biomass accumulation and net primary productivity, to explore whether productivity correlates with community evenness and richness in a way that evenness appears to buffer the effect of richness. Specifically, we evaluated whether low levels of evenness in speciose communities correlate with the attenuation of the richness-productivity relationship.3. We found that tree species richness and evenness are negatively correlated across forests globally, with highly speciose forests typically comprising a few dominant and many rare species. Furthermore, we found that the correlation between diversity and productivity changes with evenness: at low richness, uneven communities are more productive, while at high richness, even communities are more productive.4. Synthesis. Collectively, these results demonstrate that evenness is an integral component of the relationship between biodiversity and productivity, and that the attenuating effect of richness on forest productivity might be partly explained by low evenness in speciose communities. Productivity generally increases with species richness, until reduced evenness limits the overall increases in community diversity. Our research suggests that evenness is a fundamental component of biodiversity-ecosystem function relationships, and is of critical importance for guiding conservation and sustainable ecosystem management decisions.
2023-06-01T00:00:00Z